pushchair vs wheeled vehicle

pushchair and wheeled vehicle both are nouns.

Word	Noun	Adjective	Verb	Adverb
pushchair	Yes	No	No	No
wheeled vehicle	Yes	No	No	No

As nouns, wheeled vehicle is a hypernym of pushchair; that is, wheeled vehicle is a word with a broader meaning than pushchair:

pushchair: a small vehicle with four wheels in which a baby or child is pushed around
wheeled vehicle: a vehicle that moves on wheels and usually has a container for transporting things or people

pushchair (noun)	wheeled vehicle (noun)
a small vehicle with four wheels in which a baby or child is pushed around	a vehicle that moves on wheels and usually has a container for transporting things or people