tyre vs pneumatic tyre

tyre and pneumatic tyre both are nouns.

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

As nouns, pneumatic tyre is a hyponym of tyre; that is, pneumatic tyre is a word with a more specific, narrower meaning than tyre:

tyre: hoop that covers a wheel
pneumatic tyre: a tire made of reinforced rubber and filled with compressed air; used on motor vehicles and bicycles etc

Other hyponyms of tyre include auto tire, automobile tire, car tire, rubber tire, pneumatic tire, wagon tire.

tyre (noun)	pneumatic tyre (noun)
hoop that covers a wheel	a tire made of reinforced rubber and filled with compressed air; used on motor vehicles and bicycles etc