pellitory vs Anacyclus pyrethrum

pellitory and Anacyclus pyrethrum both are nouns.

Word	Noun	Adjective	Verb	Adverb
pellitory	Yes	No	No	No
Anacyclus pyrethrum	Yes	No	No	No

As nouns, pellitory and Anacyclus pyrethrum are synonyms defined as:

pellitory and Anacyclus pyrethrum: a small Mediterranean plant containing a volatile oil once used to relieve toothache

Other synonyms of pellitory include pellitory-of-Spain.

pellitory (noun)	Anacyclus pyrethrum (noun)
a small Mediterranean plant containing a volatile oil once used to relieve toothache	a small Mediterranean plant containing a volatile oil once used to relieve toothache
herb that grows in crevices having long narrow leaves and small pink apetalous flowers