snow tire vs pneumatic tire

snow tire and pneumatic tire both are nouns.

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

As nouns, pneumatic tire is a hypernym of snow tire; that is, pneumatic tire 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 tire: 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 tyre.

snow tire (noun)	pneumatic tire (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