red clover vs clover

red clover and clover both are nouns.

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

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

red clover: erect to decumbent short-lived perennial having red-purple to pink flowers; the most commonly grown forage clover
clover: a plant of the genus Trifolium

Other hypernyms of red clover include trefoil.

red clover (noun)	clover (noun)
erect to decumbent short-lived perennial having red-purple to pink flowers; the most commonly grown forage clover	a plant of the genus Trifolium