infant's-breath vs white madder

infant's-breath and white madder both are nouns.

Word	Noun	Adjective	Verb	Adverb
infant's-breath	Yes	No	No	No
white madder	Yes	No	No	No

As nouns, infant's-breath and white madder are synonyms defined as:

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

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

infant's-breath (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