dam vs def, What's the Difference?

Which to use

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

#34,654
“dam” frequency rank: #32,132
“def” frequency rank: 66786
confusion score

Side-by-Side Comparison

Feature	dam	def
Definition	senhora	algo muito bom

Where the spellings diverge

Shared letters are muted; the letters that actually set dam and def apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.

3 ch

dam

3 ch

def

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: dam is /dɑːm/ ouvir^(fonte ?) while def is /dɛf/. 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 (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 66786, derived from the frequency rank of both members and their visual similarity.

dam is recorded at frequency rank #34,654, classified as anoun, pronounced /dɑːm/ ouvir^(fonte ?). def is at rank #32,132, tagged as anadj, pronounced /dɛf/.

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 66786, this pair ranks #4,865 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of dam vs def

Shared letters: d. Private to "dam": am. Private to "def": ef.

"dam" · 3 letters · shape CVC · "def" · 3 letters · shape CVC

Frequency comparison

dam#34,654

def#32,132

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

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

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

Which is more common, "dam" or "def"?

"def" is the more common of the two: it sits at frequency rank #32,132 in our Portuguese list, against #34,654 for "dam". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering dam vs def

The fastest way to pick the right one every time.

Check the role first: if you need a noun, it's “dam”; for an adjective, it's “def”.
See each word in full, definition, IPA, etymology and its other confusables. Full “dam” entry
Browse more pairs most likely to be confused. Most confusable