mar vs blackhead

mar and blackhead both are nouns.

Word	Noun	Adjective	Verb	Adverb
mar	Yes	No	Yes	No
blackhead	Yes	No	No	No

As nouns, blackhead is a hyponym of mar; that is, blackhead is a word with a more specific, narrower meaning than mar:

mar: a mark or flaw that spoils the appearance of something (especially on a person's body)
blackhead: a black-tipped plug clogging a pore of the skin

mar (noun)	blackhead (noun)
a mark or flaw that spoils the appearance of something (especially on a person's body)	a black-tipped plug clogging a pore of the skin

mar (verb)	blackhead (verb)
destroy or injure severely
make imperfect