scissors kick vs swimming kick

scissors kick and swimming kick both are nouns.

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

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

scissors kick: a kick used in the sidestroke; legs are brought together in a scissoring motion
swimming kick: a movement of the legs in swimming

scissors kick (noun)	swimming kick (noun)
a kick used in the sidestroke; legs are brought together in a scissoring motion	a movement of the legs in swimming