ICJvsiffWhat's the difference?

Quick tell: ICJ is a name, iff is a conjunction, so they fill different roles in a sentence.

Which to use

“ICJ” is a name and “iff” is a conjunction - they look or sound alike but fill different roles in a sentence.

#49,411
“ICJ” frequency rank
#45,443
“iff” frequency rank
94854
confusion score

Side-by-Side Comparison

Feature ICJ iff
Definition Initialism of International Court of Justice. Abbreviation of if and only if.

Where the spellings diverge

Shared letters are muted; the letters that actually set ICJ and iff apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.

3 ch
ICJ
3 ch
iff

Spelling & Dictionary Insight

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ICJ is aname and iffaconjunction. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 94854, derived from the frequency rank of both members and their visual similarity.

ICJ is recorded at frequency rank #49,411, classified as aname. iff is at rank #45,443, tagged as aconj, pronounced /ɪf ən(d)ˈəʊn.li ɪf/.

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 94854, this pair ranks #1,208 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of ICJ vs iff

Shared letters: i. Private to "ICJ": cj. Private to "iff": f.

"ICJ" · 3 letters · shape VCC  ·  "iff" · 3 letters · shape VCC

Frequency comparison

ICJ#49,411
iff#45,443

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "ICJ" and "iff" be used interchangeably?
No - they are not even the same part of speech. "ICJ" is a name and "iff" a conjunction, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "ICJ" or "iff"?
"iff" is the more common of the two: it sits at frequency rank #45,443 in our English list, against #49,411 for "ICJ". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering ICJ vs iff

The fastest way to pick the right one every time.

  • Check the role first: if you need a name, it's “ICJ”; for a conjunction, it's “iff”.
  • See each word in full, definition, IPA, etymology and its other confusables. Full “ICJ” 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 FrequencyWords open word-frequency list