pat vs PM, What's the Difference?

Which to use

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

#4,785
“pat” frequency rank: #2,086
“PM” frequency rank: 6871
confusion score

Side-by-Side Comparison

Feature	pat	PM
Definition	The sound of a light slap or tap with a soft flat object, especially of a footstep.	Initialism of post mortem.

Where the eye mixes pat and PM

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

3 ch

pat

2 ch

Why the eye confuses pat with PM

A purely visual mix-up. pat (/pæt/) and PM (/ˌpiː ˈɛm/) 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 6871, derived from the frequency rank of both members and their visual similarity.

pat is recorded at frequency rank #4,785, classified as anoun, pronounced /pæt/. PM is at rank #2,086, tagged as anoun, pronounced /ˌpiː ˈɛm/.

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 6871, this pair ranks #509,637 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of pat vs PM

Shared letters: p. Private to "pat": at. Private to "PM": m.

"pat" · 3 letters · shape CVC · "PM" · 2 letters · shape CC

Frequently Asked Questions

Is swapping "pat" for "PM" ever safe?

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

Frequency check: "pat" vs "PM" - which ranks higher?

"PM" is the more common of the two: it sits at frequency rank #2,086 in our English list, against #4,785 for "pat". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

Full dictionary entry for "pat" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "PM" - compare definitions side by side with the headword page. Word entry
This pair ranks #509,637 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"pat" and "PM" also get mixed up with nearby pairs, the highest-scored neighbour is "pat vs PPA". Nearby pair

Confusion rank #509,637 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.