lobster plant vs spurge

lobster plant and spurge both are nouns.

Word	Noun	Adjective	Verb	Adverb
lobster plant	Yes	No	No	No
spurge	Yes	No	No	No

As nouns, spurge is a hypernym of lobster plant; that is, spurge is a word with a broader meaning than lobster plant:

lobster plant: tropical American plant having poisonous milk and showy tapering usually scarlet petallike leaves surrounding small yellow flowers
spurge: any of numerous plants of the genus Euphorbia; usually having milky often poisonous juice

lobster plant (noun)	spurge (noun)
tropical American plant having poisonous milk and showy tapering usually scarlet petallike leaves surrounding small yellow flowers	any of numerous plants of the genus Euphorbia; usually having milky often poisonous juice