def vs der, What's the Difference?

Which to use

“def” is an adjective and “der” is a verb - they look or sound alike but fill different roles in a sentence.

#32,132
“def” frequency rank: #1,567
“der” frequency rank: 33699
confusion score

Side-by-Side Comparison

Feature	def	der
Definition	algo muito bom	primeira pessoa do singular do futuro do conjuntivo/subjuntivo do verbo dar

Where the eye mixes def and der

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch

def

3 ch

der

Look-alike desk: def vs der

These two trip readers on the page rather than in the ear: def is /dɛf/ while der is /dɛɾ/, /dɛ/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - f in “def” becomes r in “der”, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 33699, derived from the frequency rank of both members and their visual similarity.

def is recorded at frequency rank #32,132, classified as anadj, pronounced /dɛf/. der is at rank #1,567, tagged as averb, pronounced /dɛɾ/, /dɛ/.

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 33699, this pair ranks #33,735 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of def vs der

Shared letters: de. Private to "def": f. Private to "der": r.

"def" · 3 letters · shape CVC · "der" · 3 letters · shape CVC

Frequently Asked Questions

Can "def" and "der" be used interchangeably?

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

Frequency check: "def" vs "der" - which ranks higher?

"der" is the more common of the two: it sits at frequency rank #1,567 in our Portuguese list, against #32,132 for "def". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

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

Full dictionary entry for "def" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "der" - compare definitions side by side with the headword page. Word entry
This pair ranks #33,735 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"def" and "der" also get mixed up with nearby pairs, the highest-scored neighbour is "dat vs def". Nearby pair

Confusion rank #33,735 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.