ill vs IPA, What's the Difference?

Which to use

“ill” is an adverb and “IPA” is an abbrev - they look or sound alike but fill different roles in a sentence.

#25,175
“ill” frequency rank: #43,994
“IPA” frequency rank: 69169
confusion score

Side-by-Side Comparison

Feature	ill	IPA
Definition	schlecht, falsch	Internationales Phonetisches Alphabet

Where the spellings diverge

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

3 ch

ill

3 ch

IPA

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: ill is [ɪl] while IPA is [ˌiːpeːˈʔaː]. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (adverb vs abbrev), which is usually the fastest check. Our composite confusion score for this pair is 69169, derived from the frequency rank of both members and their visual similarity.

ill is recorded at frequency rank #25,175, classified as anadv, pronounced [ɪl]. IPA is at rank #43,994, tagged as anabbrev, pronounced [ˌiːpeːˈʔaː].

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 69169, this pair ranks #484,895 of 2,006,359 scored German confusable pairs - among the most confusable pairs.

Orthographic DNA of ill vs IPA

Shared letters: i. Private to "ill": l. Private to "IPA": ap.

"ill" · 3 letters · shape VCC · "IPA" · 3 letters · shape VCV

Frequency comparison

ill#25,175

IPA#43,994

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "ill" and "IPA" be used interchangeably?

No - they are not even the same part of speech. "ill" is an adverb and "IPA" an abbrev, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "ill" or "IPA"?

"ill" is the more common of the two: it sits at frequency rank #25,175 in our German list, against #43,994 for "IPA". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering ill vs IPA

The fastest way to pick the right one every time.

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