K7 vs key, What's the Difference?

Which to use

“K7” is an abbrev and “key” is an adjective - they look or sound alike but fill different roles in a sentence.

#42,522
“K7” frequency rank: #10,384
“key” frequency rank: 52906
confusion score

Side-by-Side Comparison

Feature	K7	key
Definition	cassete	indispensável

Where the eye mixes K7 and key

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

2 ch

3 ch

key

Look-alike desk: K7 vs key

These two trip readers on the page rather than in the ear: K7 is /ka.sɛt/ while key is /kiː/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (abbrev vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 52906, derived from the frequency rank of both members and their visual similarity.

K7 is recorded at frequency rank #42,522, classified as anabbrev, pronounced /ka.sɛt/. key is at rank #10,384, tagged as anadj, pronounced /kiː/.

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 52906, this pair ranks #12,403 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of K7 vs key

Shared letters: k. Private to "K7": -. Private to "key": ey.

"K7" · 1 letters · shape C · "key" · 3 letters · shape CVV

Frequently Asked Questions

Can "K7" and "key" be used interchangeably?

No - they are not even the same part of speech. "K7" is an abbrev and "key" an adjective, so a sentence built for one is usually ungrammatical with the other.

In ordinary Portuguese text, does "K7" or "key" show up more?

"key" is the more common of the two: it sits at frequency rank #10,384 in our Portuguese list, against #42,522 for "K7". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

Full dictionary entry for "K7" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "key" - compare definitions side by side with the headword page. Word entry
This pair ranks #12,403 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"K7" and "key" also get mixed up with nearby pairs, the highest-scored neighbour is "K7 vs kde". Nearby pair

Confusion rank #12,403 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.