bootboys vs youth subculture

bootboys and youth subculture both are nouns.

Word	Noun	Adjective	Verb	Adverb
bootboys	Yes	No	No	No
youth subculture	Yes	No	No	No

As nouns, youth subculture is a hypernym of bootboys; that is, youth subculture is a word with a broader meaning than bootboys:

bootboys: a youth subculture that appeared first in England in the late 1960s as a working-class reaction to the hippies; hair was cropped close to the scalp; wore work-shirts and short jeans (supported by suspenders) and heavy red boots; involved in attacks against Asians and football hooliganism
youth subculture: a minority youth culture whose distinctiveness depended largely on the social class and ethnic background of its members; often characterized by its adoption of a particular music genre

bootboys (noun)	youth subculture (noun)
a youth subculture that appeared first in England in the late 1960s as a working-class reaction to the hippies; hair was cropped close to the scalp; wore work-shirts and short jeans (supported by suspenders) and heavy red boots; involved in attacks against Asians and football hooliganism	a minority youth culture whose distinctiveness depended largely on the social class and ethnic background of its members; often characterized by its adoption of a particular music genre