retread vs car tire

retread and car tire both are nouns.

Word	Noun	Adjective	Verb	Adverb
retread	Yes	No	Yes	No
car tire	Yes	No	No	No

As nouns, car tire is a hypernym of retread; that is, car tire is a word with a broader meaning than retread:

retread: a used automobile tire that has been remolded to give it new treads
car tire: a tire consisting of a rubber ring around the rim of an automobile wheel

Other hypernyms of retread include auto tire, automobile tire, rubber tire.

retread (noun)	car tire (noun)
a used automobile tire that has been remolded to give it new treads	a tire consisting of a rubber ring around the rim of an automobile wheel

retread (verb)	car tire (verb)
give new treads to (a tire)
use again in altered form