girth vs cinch

girth and cinch both are nouns.

Word	Noun	Adjective	Verb	Adverb
girth	Yes	No	Yes	No
cinch	Yes	No	Yes	No

As nouns, girth and cinch are synonyms defined as:

girth and cinch: stable gear consisting of a band around a horse's belly that holds the saddle in place

As verbs, girth and cinch are synonyms defined as:

girth (noun)	cinch (noun)
stable gear consisting of a band around a horse's belly that holds the saddle in place	a form of all fours in which the players bid for the privilege of naming trumps
the distance around a person's body	any undertaking that is easy to do
	stable gear consisting of a band around a horse's belly that holds the saddle in place