coif vs roach

coif and roach both are nouns.

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

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

coif (noun)	roach (noun)
a skullcap worn by nuns under a veil or by soldiers under a hood of mail or formerly by British sergeants-at-law	any of numerous chiefly nocturnal insects; some are domestic pests
the arrangement of the hair (especially a woman's hair)	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

coif (verb)	roach (verb)
arrange attractively	cut the mane off (a horse)
cover with a coif	comb (hair) into a roach