bird's foot clover vs babies' slippers

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

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

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

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

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

bird's foot clover (noun)	babies' slippers (noun)
European forage plant having claw-shaped pods introduced in America	European forage plant having claw-shaped pods introduced in America