false lupine vs bush pea

false lupine and bush pea both are nouns.

Word	Noun	Adjective	Verb	Adverb
false lupine	Yes	No	No	No
bush pea	Yes	No	No	No

As nouns, bush pea is a hypernym of false lupine; that is, bush pea is a word with a broader meaning than false lupine:

false lupine: western United States bushy herb having yellow pea-like flowers
bush pea: any of various plants of the genus Thermopsis having trifoliate leaves and yellow or purple racemose flowers

false lupine (noun)	bush pea (noun)
western United States bushy herb having yellow pea-like flowers	any of various plants of the genus Thermopsis having trifoliate leaves and yellow or purple racemose flowers