snow tire vs pneumatic tyre

snow tire and pneumatic tyre both are nouns.

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

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

snow tire: an automobile pneumatic tire with deep tread to give traction in snow
pneumatic tyre: a tire made of reinforced rubber and filled with compressed air; used on motor vehicles and bicycles etc

Other hypernyms of snow tire include pneumatic tire.

snow tire (noun)	pneumatic tyre (noun)
an automobile pneumatic tire with deep tread to give traction in snow	a tire made of reinforced rubber and filled with compressed air; used on motor vehicles and bicycles etc