stroller vs wheeled vehicle

stroller and wheeled vehicle both are nouns.

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

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

stroller: 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

stroller (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
someone who walks at a leisurely pace