Synonyms of quaternary

1 Syllable
fours, four
2 Syllables
quartet, tetrad, fourer
3 Syllables
quadruple, quadrivial, quaternions, quaternion, quadrivium, quartette, quadruplet
4 Syllables
tetralogy, quaternity, quaternate
5 Syllables
quadruplicate, quadrigeminal, quadripartite, quadrumvirate, quadripartition