steampunk vs punk rocker

steampunk and punk rocker both are nouns.

Word	Noun	Adjective	Verb	Adverb
steampunk	Yes	No	No	No
punk rocker	Yes	No	No	No

As nouns, punk rocker is a hypernym of steampunk; that is, punk rocker is a word with a broader meaning than steampunk:

steampunk: A subgenre of speculative science fiction set in an anachronistic 19th century society.
punk rocker: a teenager or young adult who is a performer (or enthusiast) of punk rock and a member of the punk youth subculture

Other hypernyms of steampunk include genre, literary genre, writing style, punk.

steampunk (noun)	punk rocker (noun)
A subgenre of speculative science fiction set in an anachronistic 19th century society.	a teenager or young adult who is a performer (or enthusiast) of punk rock and a member of the punk youth subculture