fievsfooWhat's the difference?

Quick tell: fie is a intj, foo is a noun, so they fill different roles in a sentence.

Which to use

“fie” is an intj and “foo” is a noun - they look or sound alike but fill different roles in a sentence.

#45,929
“fie” frequency rank
#18,562
“foo” frequency rank
64491
confusion score

Side-by-Side Comparison

Feature fie foo
Definition Sometimes followed by on or upon: used to express distaste, disgust, or outrage. Alternative form of fu: an administrative subdivision of imperial China; the capital of such divisions.

Where the spellings diverge

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

3 ch
fie
3 ch
foo

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: fie is /faɪ/ while foo is /fuː/. 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 (intj vs noun), which is usually the fastest check. Our composite confusion score for this pair is 64491, derived from the frequency rank of both members and their visual similarity.

fie is recorded at frequency rank #45,929, classified as anintj, pronounced /faɪ/. foo is at rank #18,562, tagged as anoun, pronounced /fuː/.

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 64491, this pair ranks #77,462 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of fie vs foo

Shared letters: f. Private to "fie": ei. Private to "foo": o.

"fie" · 3 letters · shape CVV  ·  "foo" · 3 letters · shape CVV

Frequency comparison

fie#45,929
foo#18,562

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "fie" and "foo" be used interchangeably?
No - they are not even the same part of speech. "fie" is an intj and "foo" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "fie" or "foo"?
"foo" is the more common of the two: it sits at frequency rank #18,562 in our English list, against #45,929 for "fie". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering fie vs foo

The fastest way to pick the right one every time.

  • Check the role first: if you need an intj, it's “fie”; for a noun, it's “foo”.
  • See each word in full, definition, IPA, etymology and its other confusables. Full “fie” 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