bird's foot trefoil vs babies' slippers

bird's foot trefoil and babies' slippers both are nouns.

Word	Noun	Adjective	Verb	Adverb
bird's foot trefoil	Yes	No	No	No
babies' slippers	Yes	No	No	No

As nouns, bird's foot trefoil and babies' slippers are synonyms defined as:

bird's foot trefoil and babies' slippers: European forage plant having claw-shaped pods introduced in America

Other synonyms of bird's foot trefoil include bacon and eggs, bird's foot clover, Lotus corniculatus.

bird's foot trefoil (noun)	babies' slippers (noun)
European forage plant having claw-shaped pods introduced in America	European forage plant having claw-shaped pods introduced in America
Old World herb related to fenugreek