bassinet vs baby's bed

bassinet and baby's bed both are nouns.

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

As nouns, baby's bed is a hypernym of bassinet; that is, baby's bed is a word with a broader meaning than bassinet:

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

Other hypernyms of bassinet include baby bed.

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