radial tire vs pneumatic tyre

radial tire and pneumatic tyre both are nouns.

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

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

radial tire: pneumatic tire that has radial-ply casing
pneumatic tyre: 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 tire.

radial tire (noun)	pneumatic tyre (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