flannel leaf vs mullein

flannel leaf and mullein both are nouns.

Word	Noun	Adjective	Verb	Adverb
flannel leaf	Yes	No	No	No
mullein	Yes	No	No	No

As nouns, flannel leaf and mullein are synonyms defined as:

flannel leaf and mullein: any of various plants of the genus Verbascum having large usually woolly leaves and terminal spikes of yellow or white or purplish flowers

Other synonyms of flannel leaf include velvet plant.

flannel leaf (noun)	mullein (noun)
any of various plants of the genus Verbascum having large usually woolly leaves and terminal spikes of yellow or white or purplish flowers	any of various plants of the genus Verbascum having large usually woolly leaves and terminal spikes of yellow or white or purplish flowers