stroller vs bassinet

stroller and bassinet both are nouns.

Word	Noun	Adjective	Verb	Adverb
stroller	Yes	No	No	No
bassinet	Yes	No	No	No

As nouns, bassinet is a hyponym of stroller; that is, bassinet is a word with a more specific, narrower meaning than stroller:

stroller: a small vehicle with four wheels in which a baby or child is pushed around
bassinet: a perambulator that resembles a bassinet

stroller (noun)	bassinet (noun)
a small vehicle with four wheels in which a baby or child is pushed around	a basket (usually hooded) used as a baby's bed
someone who walks at a leisurely pace	a perambulator that resembles a bassinet