senega vs milkwort

senega and milkwort both are nouns.

Word	Noun	Adjective	Verb	Adverb
senega	Yes	No	No	No
milkwort	Yes	No	No	No

As nouns, milkwort is a hypernym of senega; that is, milkwort is a word with a broader meaning than senega:

senega: perennial bushy herb of central and southern United States having white flowers with green centers and often purple crest; similar to Seneca snakeroot
milkwort: any of various plants of the genus Polygala

senega (noun)	milkwort (noun)
perennial bushy herb of central and southern United States having white flowers with green centers and often purple crest; similar to Seneca snakeroot	any of various plants of the genus Polygala
dried root of two plants of the genus Polygala containing an irritating saponin