madvsmarWhat's the difference?

Quick tell: mad is a adjective, mar is a noun, so they fill different roles in a sentence.

Which to use

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

#14,642
“mad” frequency rank
#674
“mar” frequency rank
15316
confusion score

Side-by-Side Comparison

Feature mad mar
Definition Grafía alternativa de mat. Cuerpo de agua salada que rodea los continentes de la Tierra.

Where the eye mixes mad and mar

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

3 ch
mad
3 ch
mar

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: mad is /ˈmɑːt/ while mar is [ˈmaɾ]. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - d in “mad” becomes r in “mar”, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 15316, derived from the frequency rank of both members and their visual similarity.

mad is recorded at frequency rank #14,642, classified as anadj, pronounced /ˈmɑːt/. mar is at rank #674, tagged as anoun, pronounced [ˈmaɾ].

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 15316, this pair ranks #280,672 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of mad vs mar

Shared letters: am. Private to "mad": d. Private to "mar": r.

"mad" · 3 letters · shape CVC  ·  "mar" · 3 letters · shape CVC

Frequently Asked Questions

Can "mad" and "mar" be used interchangeably?
No - they are not even the same part of speech. "mad" is an adjective and "mar" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "mad" or "mar"?
"mar" is the more common of the two: it sits at frequency rank #674 in our Spanish list, against #14,642 for "mad". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

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

Source: FrequencyWords open word-frequency list