kick start vs starting motor

kick start and starting motor both are nouns.

Word	Noun	Adjective	Verb	Adverb
kick start	Yes	No	No	No
starting motor	Yes	No	No	No

As nouns, starting motor is a hypernym of kick start; that is, starting motor is a word with a broader meaning than kick start:

kick start: a starter (as on a motorcycle) that is activated with the foot and the weight of the body
starting motor: an electric motor for starting an engine

Other hypernyms of kick start include starter, starter motor.

kick start (noun)	starting motor (noun)
a starter (as on a motorcycle) that is activated with the foot and the weight of the body	an electric motor for starting an engine