white clover vs clover

white clover and clover both are nouns.

Word	Noun	Adjective	Verb	Adverb
white clover	Yes	No	No	No
clover	Yes	No	No	No

As nouns, clover is a hypernym of white clover; that is, clover is a word with a broader meaning than white clover:

white clover: creeping European clover having white to pink flowers and bright green leaves; naturalized in United States; widely grown for forage
clover: a plant of the genus Trifolium

Other hypernyms of white clover include trefoil.

white clover (noun)	clover (noun)
creeping European clover having white to pink flowers and bright green leaves; naturalized in United States; widely grown for forage	a plant of the genus Trifolium