tierce vs ternary

tierce and ternary both are nouns.

Word	Noun	Adjective	Verb	Adverb
tierce	Yes	No	No	No
ternary	Yes	Yes	No	No

As nouns, tierce and ternary are synonyms defined as:

tierce and ternary: the cardinal number that is the sum of one and one and one

Other synonyms of tierce include 3, deuce-ace, III, leash, tercet, ternion, terzetto, three, threesome, trey, triad, trine, trinity, trio, triplet, troika.

tierce (noun)	ternary (noun)
one of three equal parts of a divisible whole	the cardinal number that is the sum of one and one and one
the cardinal number that is the sum of one and one and one
the third canonical hour; about 9 a.m.

tierce (adjective)	ternary (adjective)
	having three units or components or elements