thavstomWhich spelling fits?

Quick tell: tha is a verb, tom is a noun, so they fill different roles in a sentence.

Which to use

“tha” is a verb and “tom” is a noun - they look or sound alike but fill different roles in a sentence.

#38,931
“tha” frequency rank
#1,262
“tom” frequency rank
40193
confusion score

Side-by-Side Comparison

Feature tha tom
Definition presente do verbo bi (ser, estar); sou/estou, é/está, somos/estamos, são/estão qualquer som, no que se refere à sua amplitude, fonte, potência, etc.:

Where the eye mixes tha and tom

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

3 ch
tha
3 ch
tom

Visual trap between tha and tom

These two trip readers on the page rather than in the ear: tha is /ha/ while tom is /ˈtõ/. 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 (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 40193, derived from the frequency rank of both members and their visual similarity.

tha is recorded at frequency rank #38,931, classified as averb, pronounced /ha/. tom is at rank #1,262, tagged as anoun, pronounced /ˈtõ/.

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 40193, this pair ranks #25,964 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of tha vs tom

Shared letters: t. Private to "tha": ah. Private to "tom": mo.

"tha" · 3 letters · shape CCV  ·  "tom" · 3 letters · shape CVC

Frequently Asked Questions

Can "tha" and "tom" be used interchangeably?
No - they are not even the same part of speech. "tha" is a verb and "tom" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "tha" or "tom"?
"tom" is the more common of the two: it sits at frequency rank #1,262 in our Portuguese list, against #38,931 for "tha". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "tha" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "tom" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #25,964 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "tha" and "tom" also get mixed up with nearby pairs, the highest-scored neighbour is "tha vs tosa". Nearby pair

Confusion rank #25,964 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list