white bedstraw vs white madder

white bedstraw and white madder both are nouns.

Word	Noun	Adjective	Verb	Adverb
white bedstraw	Yes	No	No	No
white madder	Yes	No	No	No

As nouns, white bedstraw and white madder are synonyms defined as:

white bedstraw and white madder: Eurasian herb with ample panicles of small white flowers; naturalized in North America

Other synonyms of white bedstraw include false baby's breath, Galium mollugo, infant's-breath, wild madder.

white bedstraw (noun)	white madder (noun)
Eurasian herb with ample panicles of small white flowers; naturalized in North America	Eurasian herb with ample panicles of small white flowers; naturalized in North America