ἰσοσύλλαβος

ον, Adv.
A. having the same number of syllables, Plu. 2.739a, Hermog. Id. 1.12, A.D. Pron. 11.8, etc. Adv. ‐βως St.Byz. s.v. Ἄβαι, EM 552.34.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project