imp vs brownie

imp and brownie both are nouns.

Word	Noun	Adjective	Verb	Adverb
imp	Yes	No	No	No
brownie	Yes	No	No	No

As nouns, imp and brownie are synonyms defined as:

Other synonyms of imp include elf, gremlin, hob, pixie, pixy.

imp (noun)	brownie (noun)
one who is playfully mischievous	square or bar of very rich chocolate cake usually with nuts
(folklore) fairies that are somewhat mischievous	(folklore) fairies that are somewhat mischievous