baby bed vs bassinet

baby bed and bassinet both are nouns.

Word	Noun	Adjective	Verb	Adverb
baby bed	Yes	No	No	No
bassinet	Yes	No	No	No

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

baby bed: a small bed for babies; enclosed by sides to prevent the baby from falling
bassinet: a basket (usually hooded) used as a baby's bed

Other hyponyms of baby bed include carrycot, cradle, cot, crib.

baby bed (noun)	bassinet (noun)
a small bed for babies; enclosed by sides to prevent the baby from falling	a basket (usually hooded) used as a baby's bed
	a perambulator that resembles a bassinet