NICU

noun

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

"nicu" is a 4-letter English headword indexed on PlainSpell.

The verdict

“NICU” has 5 generated spelling variants in the English index at frequency #43,808. The variants make it a useful spelling check.

#43,808
frequency rank, English
1,534
“N” headwords
5
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of neonatal intensive care unit.

Corpus desk

Index EN-nicu · NICU · English

NICU · rank #43,808 · 5 variants · 20 confusables

  • FREQ-MID #43,808
  • LEN-MID 4 letters
  • VOW-2 2 vowels
  • CONFUS-HIGH 20 pairs
  • VAR-MID 5 variants
  • BOOK-MID 1,534
  • PHOTO-FINISH NFS

Nearest frequency peer: NFS (-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 “NICU”

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

corpus weight

What this shows “NICU” 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).

NICU vs nu
0% similar
NICU vs NYC
50% similar
NICU vs NIH
50% similar

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

Key facts for NICU
PropertyValue
HeadwordNICU
LanguageEnglish
Part of speechNoun
Letters4
Frequency rank#43,808
Misspellings tracked5
Confusable pairs20
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “NICU”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).NICUlands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “NFS” (#43,807), “nighter” (#43,809), “NEX” (#43,806). Among 1,534 “N” headwords, “NICU” is #43,808. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 5 spelling variants around NICU, anoun. Corpus frequency is #43,808 among 1,534 “N” headwords. Dominant gloss: "Initialism of neonatal intensive care unit.".

Our generated misspelling index lists 5 likely wrong-spelling variants for NICU, with forms such as "incu", "nciu", and "niccu". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 20 confusable-pair relationships, "nu", "NYC", "NIH", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

No documented word history exists for this headword, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct English form is NICU, spelled N-I-C-U.

Definition

  1. 1
    Initialism of neonatal intensive care unit.

Recorded use

Wiktionary example

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

  1. Preterm infants and other infants in the NICU should be placed in the supine position for sleep as soon as the infant is medically stable and significantly before the infant’s anticipated discharge, by 32 weeks’ postmenstrual age. […] Staff in NICUs should model and implement all SIDS risk-reduction recommendations as soon as the infant is clinically stab…

Common misspellings

Also misspelled as:

  • incu
  • nciu
  • niccu
  • niuc
  • nnicu

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of NICU - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

incu2nciu2niccu1niuc2nnicu1
Edit distance from "NICU"

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 "NICU"?
"NICU" is spelled N-I-C-U.
What does "NICU" mean?
As a noun, "NICU" means: Initialism of neonatal intensive care unit.
What words are commonly confused with "NICU"?
"NICU" is commonly confused with "nu", "NYC", "NIH". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What language does "NICU" come from?
"NICU" is a English word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
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 "NICU", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 4 letters (nearest by frequency rank).

mosh#43,796milt#43,788Pima#43,846lolo#43,763

Similar misspelling depth

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

Iver5 variantsgoya5 variantsgard5 variantsTans5 variants

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

Source: FrequencyWords open word-frequency list