purple clover vs red clover

purple clover and red clover both are nouns.

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

As nouns, purple clover and red clover are synonyms defined as:

purple clover and red clover: erect to decumbent short-lived perennial having red-purple to pink flowers; the most commonly grown forage clover

Other synonyms of purple clover include Trifolium pratense.

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