nicker vs whinny

nicker and whinny both are nouns.

Word	Noun	Adjective	Verb	Adverb
nicker	Yes	No	Yes	No
whinny	Yes	No	Yes	No

As nouns, nicker and whinny are synonyms defined as:

Other synonyms of nicker include neigh, whicker.

As verbs, nicker and whinny are synonyms defined as:

Other synonyms of nicker include neigh, whicker.

nicker (noun)	whinny (noun)
the characteristic sounds made by a horse	the characteristic sounds made by a horse

nicker (verb)	whinny (verb)
make a characteristic sound, of a horse	make a characteristic sound, of a horse