roach vs hair style

roach and hair style both are nouns.

Word	Noun	Adjective	Verb	Adverb
roach	Yes	No	Yes	No
hair style	Yes	No	No	No

As nouns, hair style is a hypernym of roach; that is, hair style is a word with a broader meaning than roach:

Other hypernyms of roach include coif, coiffure, hairdo, hairstyle.

roach (noun)	hair style (noun)
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

roach (verb)	hair style (verb)
cut the mane off (a horse)
comb (hair) into a roach