frog kick vs swimming kick

frog kick and swimming kick both are nouns.

Word	Noun	Adjective	Verb	Adverb
frog kick	Yes	No	No	No
swimming kick	Yes	No	No	No

As nouns, swimming kick is a hypernym of frog kick; that is, swimming kick is a word with a broader meaning than frog kick:

frog kick: a swimming kick; knees are drawn upward and outward so the legs can be brought together when fully extended
swimming kick: a movement of the legs in swimming

frog kick (noun)	swimming kick (noun)
a swimming kick; knees are drawn upward and outward so the legs can be brought together when fully extended	a movement of the legs in swimming