polecat vs foulmart

polecat and foulmart both are nouns.

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

As nouns, polecat and foulmart are synonyms defined as:

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

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

polecat (noun)	foulmart (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