kick starter vs starting motor

kick starter and starting motor both are nouns.

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

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

kick starter: 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 starter include starter, starter motor.

kick starter (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