deuce-ace vs ternion

deuce-ace and ternion both are nouns.

Word	Noun	Adjective	Verb	Adverb
deuce-ace	Yes	No	No	No
ternion	Yes	No	No	No

As nouns, deuce-ace and ternion are synonyms defined as:

deuce-ace and ternion: the cardinal number that is the sum of one and one and one

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

deuce-ace (noun)	ternion (noun)
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