fitch vs polecat

fitch and polecat both are nouns.

Word	Noun	Adjective	Verb	Adverb
fitch	Yes	No	No	No
polecat	Yes	No	No	No

As nouns, fitch and polecat are synonyms defined as:

fitch and polecat: dark brown mustelid of woodlands of Eurasia that gives off an unpleasant odor when threatened

Other synonyms of fitch include foulmart, foumart, Mustela putorius.

fitch (noun)	polecat (noun)
dark brown mustelid of woodlands of Eurasia that gives off an unpleasant odor when threatened	dark brown mustelid of woodlands of Eurasia that gives off an unpleasant odor when threatened
	American musteline mammal typically ejecting an intensely malodorous fluid when startled; in some classifications put in a separate subfamily Mephitinae