ugh vs um, What's the Difference?

Which to use

“ugh” and “um” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#4,993
“ugh” frequency rank: #5,846
“um” frequency rank: 10839
confusion score

Side-by-Side Comparison

Feature	ugh	um
Definition	Used to express repugnance, disgust, or annoyance.	Expression of hesitation, uncertainty or space filler in conversation.

Where the eye mixes ugh and um

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch

ugh

2 ch

Visual trap between ugh and um

A purely visual mix-up. ugh (/ʌɣ/) and um (/ʌm/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 10839, derived from the frequency rank of both members and their visual similarity.

ugh is recorded at frequency rank #4,993, classified as anintj, pronounced /ʌɣ/. um is at rank #5,846, tagged as anintj, pronounced /ʌm/.

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 10839, this pair ranks #490,254 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ugh vs um

Shared letters: u. Private to "ugh": gh. Private to "um": m.

"ugh" · 3 letters · shape VCC · "um" · 2 letters · shape VC

Frequently Asked Questions

Is swapping "ugh" for "um" ever safe?

No. They are said differently (/ʌɣ/ versus /ʌm/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

In ordinary English text, does "ugh" or "um" show up more?

"ugh" is the more common of the two: it sits at frequency rank #4,993 in our English list, against #5,846 for "um". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Eye-level mix-up between "ugh" and "um" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "ugh" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "um" - compare definitions side by side with the headword page. Word entry
This pair ranks #490,254 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"ugh" and "um" also get mixed up with nearby pairs, the highest-scored neighbour is "UAS vs um". Nearby pair

Confusion rank #490,254 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.