white madder vs false baby's breath

white madder and false baby's breath both are nouns.

Word	Noun	Adjective	Verb	Adverb
white madder	Yes	No	No	No
false baby's breath	Yes	No	No	No

As nouns, white madder and false baby's breath are synonyms defined as:

white madder and false baby's breath: Eurasian herb with ample panicles of small white flowers; naturalized in North America

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

white madder (noun)	false baby's breath (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