common mullein vs Aaron's rod

common mullein and Aaron's rod both are nouns.

Word	Noun	Adjective	Verb	Adverb
common mullein	Yes	No	No	No
Aaron's rod	Yes	No	No	No

As nouns, common mullein and Aaron's rod are synonyms defined as:

common mullein and Aaron's rod: tall-stalked very woolly mullein with densely packed yellow flowers; ancient Greeks and Romans dipped the stalks in tallow for funeral torches

Other synonyms of common mullein include flannel mullein, great mullein, torch, Verbascum thapsus, woolly mullein.

common mullein (noun)	Aaron's rod (noun)
tall-stalked very woolly mullein with densely packed yellow flowers; ancient Greeks and Romans dipped the stalks in tallow for funeral torches	tall-stalked very woolly mullein with densely packed yellow flowers; ancient Greeks and Romans dipped the stalks in tallow for funeral torches