barbel vs feeler

barbel and feeler both are nouns.

Word	Noun	Adjective	Verb	Adverb
barbel	Yes	No	No	No
feeler	Yes	No	No	No

As nouns, barbel and feeler are synonyms defined as:

barbel (noun)	feeler (noun)
slender tactile process on the jaws of a fish	one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste
	slender tactile process on the jaws of a fish
	sensitivity similar to that of a receptor organ
	a tentative suggestion designed to elicit the reactions of others