baby's bed vs furniture

baby's bed and furniture both are nouns.

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

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

baby's bed: a small bed for babies; enclosed by sides to prevent the baby from falling
furniture: furnishings that make a room or other area ready for occupancy

Other hypernyms of baby's bed include article of furniture, piece of furniture.

baby's bed (noun)	furniture (noun)
a small bed for babies; enclosed by sides to prevent the baby from falling	furnishings that make a room or other area ready for occupancy