feeler vs barbel

feeler and barbel both are nouns.

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

As nouns, feeler and barbel are synonyms defined as:

feeler (noun)	barbel (noun)
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
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