DISTICH
couple, pair, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad, duad
(noun) two items of the same kind
Source: WordNet® 3.1
Etymology
Noun
distich (plural distichs or distiches)
(prosody) A couplet, a two-line stanza making complete sense.
Any couplet.
Adjective
distich (not comparable)
Distichous.
Source: Wiktionary
Dis"tich, n. Etym: [L. distichon, Gr. stigan to ascend: cf. F.
distique. See Stirrup.] (Pros.)
Definition: A couple of verses or poetic lines making complete sense; an
epigram of two verses.
Dis"tich, Dis"tich*ous, a. Etym: [Gr. Distich, n.]
Definition: Disposed in two vertical rows; two-ranked.
Source: Webster’s Unabridged Dictionary 1913 Edition