radial tire vs pneumatic tire

radial tire and pneumatic tire both are nouns.

Word	Noun	Adjective	Verb	Adverb
radial tire	Yes	No	No	No
pneumatic tire	Yes	No	No	No

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

radial tire: pneumatic tire that has radial-ply casing
pneumatic tire: a tire made of reinforced rubber and filled with compressed air; used on motor vehicles and bicycles etc

Other hypernyms of radial tire include pneumatic tyre.

radial tire (noun)	pneumatic tire (noun)
pneumatic tire that has radial-ply casing	a tire made of reinforced rubber and filled with compressed air; used on motor vehicles and bicycles etc