hypothesize

/haɪˈpɒθ.ɪ.saɪz/

//haɪˈpɒθ.ɪ.saɪz// verb

"hypothesize" is a 11-letter English headword indexed on PlainSpell.

The verdict

“hypothesize” is uncommon English (frequency #53,009 among 2,646 “H” headwords), classed as a verb. The kind of spelling people second-guess.

#53,009
frequency rank, English
2,646
“H” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - To assume or assert tentatively on uncertain grounds.

Corpus desk

Index EN-hypothesize · hypothesize · English

hypothesize · rank #53,009 · 0 variants · 0 confusables

  • FREQ-RARE #53,009
  • LEN-MEGA 11 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 2,646
  • PHOTO-FINISH hypnotist

Nearest frequency peer: hypnotist (-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.

Long-tail ranks near “hypothesize”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “hypothesize” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for hypothesize
PropertyValue
Headwordhypothesize
LanguageEnglish
Part of speechVerb
IPA/haɪˈpɒθ.ɪ.saɪz/
Letters11
Frequency rank#53,009
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “hypothesize” in English

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).hypothesizefalls in this rarity band:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “hypnotist” (#53,008), “IFR” (#53,011), “hulking” (#53,005). Among 2,646 “H” headwords, “hypothesize” is #53,009. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

hypothesize is uncommon English at frequency #53,009 among 2,646 “H” headwords, classed as averb, transcribed /haɪˈpɒθ.ɪ.saɪz/. Rarity is why readers land here mid-draft. Gloss: "To assume or assert tentatively on uncertain grounds.".

No generated misspelling entries exist for hypothesize in our index, which points to an orthography that plays by predictable English rules. Our dataset records no confusable match here, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: From hypothesis + -ize. The correct English form is hypothesize, spelled H-Y-P-O-T-H-E-S-I-Z-E.

Definition

  1. 1
    To assume or assert tentatively on uncertain grounds.

Recorded use

Wiktionary examples

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

  1. When hormones signal breast cells to divide more rapidly, scientists hypothesize, they increase breast cancer risk by causing precancerous or cancerous cells to multiply.
  2. Census response is thus a reasonable proxy for civicminded attitudes and cooperation that are hypothesized to improve governmental performance.

Etymology

From hypothesis + -ize.

This word in other languages

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 "hypothesize"?
"hypothesize" is spelled H-Y-P-O-T-H-E-S-I-Z-E. The IPA pronunciation is /haɪˈpɒθ.ɪ.saɪz/.
What does "hypothesize" mean?
As a verb, "hypothesize" means: To assume or assert tentatively on uncertain grounds.
How do you pronounce "hypothesize"?
The IPA (International Phonetic Alphabet) transcription for "hypothesize" is /haɪˈpɒθ.ɪ.saɪz/. 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 "hypothesize"?
From hypothesis + -ize. 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 "hypothesize", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 11 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list