coiffure vs roach

coiffure and roach both are nouns.

Word	Noun	Adjective	Verb	Adverb
coiffure	Yes	No	Yes	No
roach	Yes	No	Yes	No

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

coiffure (noun)	roach (noun)
the arrangement of the hair (especially a woman's hair)	any of numerous chiefly nocturnal insects; some are domestic pests
	European freshwater food fish having a greenish back
	the butt of a marijuana cigarette
	street names for flunitrazepam
	a roll of hair brushed back from the forehead

coiffure (verb)	roach (verb)
arrange attractively	cut the mane off (a horse)
	comb (hair) into a roach