front crawl vs swimming stroke

front crawl and swimming stroke both are nouns.

Word	Noun	Adjective	Verb	Adverb
front crawl	Yes	No	No	No
swimming stroke	Yes	No	No	No

As nouns, swimming stroke is a hypernym of front crawl; that is, swimming stroke is a word with a broader meaning than front crawl:

front crawl: a swimming stroke; arms are moved alternately overhead accompanied by a flutter kick
swimming stroke: a method of moving the arms and legs to push against the water and propel the swimmer forward

front crawl (noun)	swimming stroke (noun)
a swimming stroke; arms are moved alternately overhead accompanied by a flutter kick	a method of moving the arms and legs to push against the water and propel the swimmer forward