wheeled vehicle vs pram

wheeled vehicle and pram both are nouns.

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

As nouns, pram is a hyponym of wheeled vehicle; that is, pram is a word with a more specific, narrower meaning than wheeled vehicle:

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

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