astrophysics

/ˌæs.tɹoʊˈfɪz.ɪks/

//ˌæs.tɹoʊˈfɪz.ɪks// noun

By · According to Wiktionary data (CC BY-SA) ·

"astrophysics" is a 12-letter English headword indexed on PlainSpell.

The verdict

“astrophysics” has 20 generated spelling variants in the English index at frequency #29,173. The variants make it a useful spelling check.

#29,173
frequency rank, English
3,931
“A” headwords
20
tracked misspellings
2
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The branch of astronomy or physics that deals with the physical properties of celestial bodies and with the interaction between matter and radiation in celestial bodies and in the space between them.

Corpus desk

Index EN-astrophysics · astrophysics · English

astrophysics · rank #29,173 · 20 variants · 2 confusables

  • FREQ-MID #29,173
  • LEN-MEGA 12 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 2 pairs
  • VAR-HIGH 20 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH Astrid

Nearest frequency peer: Astrid (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Rank peers near misspelling magnet “astrophysics”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “astrophysics” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

astrophysics vs astrophysical
85% similar
astrophysics vs astrophysicist
86% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for astrophysics
PropertyValue
Headwordastrophysics
LanguageEnglish
Part of speechNoun
IPA/ˌæs.tɹoʊˈfɪz.ɪks/
Letters12
Frequency rank#29,173
Misspellings tracked20
Confusable pairs2
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “astrophysics”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).astrophysicslands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “Astrid” (#29,172), “atta” (#29,174), “Baek” (#29,176). Among 3,931 “A” headwords, “astrophysics” is #29,173. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 20 spelling variants around astrophysics (IPA /ˌæs.tɹoʊˈfɪz.ɪks/), anoun. Corpus frequency is #29,173 among 3,931 “A” headwords. Dominant gloss: "The branch of astronomy or physics that deals with the physical properties of celestial bodies and with the interaction between matter and radiation in celestial bodies and in the space between them.".

Our generated misspelling index lists 20 likely wrong-spelling variants for astrophysics, with forms such as "asrtophysics", "asstrophysics", and "astorphysics". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 2 confusable-pair relationships, "astrophysical", "astrophysicist", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From astro- + physics. The correct English form is astrophysics, spelled A-S-T-R-O-P-H-Y-S-I-C-S.

Definition

  1. 1
    The branch of astronomy or physics that deals with the physical properties of celestial bodies and with the interaction between matter and radiation in celestial bodies and in the space between them.

Recorded use

Wiktionary example

These source excerpts show how astrophysics appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. The fact is, dark energy is the biggest mystery in science. It has driven a huge amount of research in the past decade, and was a key driver in last year’s “New Worlds, New Horizons” report from the National Academies of Science, which prioritized future astronomy and astrophysics projects.

Etymology

From astro- + physics.

This word in other languages

astrofísica(Español)astrophysique(Français)Astrophysik(Deutsch)

Common misspellings

Also misspelled as:

  • asrtophysics
  • asstrophysics
  • astorphysics
  • astrohpysics
  • astrophhysics
  • astrophsyics
  • astrophyiscs
  • astrophyscis
  • astrophysiccs
  • astrophysicss
  • astrophysisc
  • astrophyssics
  • astrophyysics
  • astropphysics
  • astropyhsics
  • astrpohysics
  • astrrophysics
  • asttrophysics
  • atsrophysics
  • satrophysics

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of astrophysics - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

asrtophysics2asstrophysics1astorphysics2astrohpysics2astrophhysics1astrophsyics2astrophyiscs2astrophyscis2
Edit distance from "astrophysics"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "astrophysics"?
"astrophysics" is spelled A-S-T-R-O-P-H-Y-S-I-C-S. The IPA pronunciation is /ˌæs.tɹoʊˈfɪz.ɪks/.
What does "astrophysics" mean?
As a noun, "astrophysics" means: The branch of astronomy or physics that deals with the physical properties of celestial bodies and with the interaction between matter and radiation in celestial bodies and in the space between them.
What words are commonly confused with "astrophysics"?
"astrophysics" is commonly confused with "astrophysical", "astrophysicist". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "astrophysics"?
The IPA (International Phonetic Alphabet) transcription for "astrophysics" is /ˌæs.tɹoʊˈfɪz.ɪks/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "astrophysics"?
From astro- + physics. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "astrophysics", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 12 letters (nearest by frequency rank).

undiscovered#29,135confiscation#29,220conscription#29,222ethnographic#29,264

Similar misspelling depth

Headwords with a similar count of attested misspellings (20 here; floor ≥5).

translational20 variantsnormalization20 variantsreinstatement20 variantsexperimentally20 variants

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list