unnecessarilyvsunnecessaryWhat's the difference?

Quick tell: unnecessarily is a adverb, unnecessary is an adjective, so they fill different roles in a sentence.

Which to use

“unnecessarily” is an adverb and “unnecessary” is an adjective - they look or sound alike but fill different roles in a sentence.

#16,817
“unnecessarily” frequency rank
#5,376
“unnecessary” frequency rank
22193
confusion score

Side-by-Side Comparison

Feature unnecessarily unnecessary
Definition In an unnecessary way; not by necessity. Not needed or necessary.

Where the spellings diverge

Shared letters are muted; the letters that actually set unnecessarily and unnecessary apart are highlighted. They share 11 letters in sequence, which is exactly why the eye skips the difference.

13 ch
unnecessarily
11 ch
unnecessary

Spelling & Dictionary Insight

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: unnecessarily is anadverb and unnecessaryanadjective. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 22193, derived from the frequency rank of both members and their visual similarity.

unnecessarily is recorded at frequency rank #16,817, classified as anadv. unnecessary is at rank #5,376, tagged as anadj, pronounced /ʌnˈnɛs.ə.s(ə)ɹɪ/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 22193, this pair ranks #418,369 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of unnecessarily vs unnecessary

Shared letters: acenrsuy. Private to "unnecessarily": il. Private to "unnecessary": -.

"unnecessarily" · 13 letters · shape VCCVCVCCVCVCV  ·  "unnecessary" · 11 letters · shape VCCVCVCCVCV

Known mistypes of this pair

  • unnecessarilynunecessarily · unecessarily · unencessarily · unnceessarily · unneccessarily · unnecesarily · unnecesasrily · unnecessairly
  • unnecessarynunecessary · unecessary · unencessary · unnceessary · unneccessary · unnecesary · unnecesasry · unnecessarry

Frequency comparison

unnecessarily#16,817
unnecessary#5,376

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "unnecessarily" and "unnecessary" be used interchangeably?
No - they are not even the same part of speech. "unnecessarily" is an adverb and "unnecessary" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "unnecessarily" or "unnecessary"?
"unnecessary" is the more common of the two: it sits at frequency rank #5,376 in our English list, against #16,817 for "unnecessarily". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering unnecessarily vs unnecessary

The fastest way to pick the right one every time.

  • Check the role first: if you need an adverb, it's “unnecessarily”; for an adjective, it's “unnecessary”.
  • See each word in full, definition, IPA, etymology and its other confusables. Full “unnecessarily” entry
  • Browse more pairs most likely to be confused. Most confusable

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

Source: FrequencyWords open word-frequency list