Christmas flower vs spurge

Christmas flower and spurge both are nouns.

Word	Noun	Adjective	Verb	Adverb
Christmas flower	Yes	No	No	No
spurge	Yes	No	No	No

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

Christmas flower: 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

Christmas flower (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