Παναχαιοί
From LSJ
τούτων γάρ ἑκάτερον κοινῷ ὀνόματι προσαγορεύεται ζῷον, καί ὁ λόγος δέ τῆς οὐσίας ὁ αὐτός → and these are univocally so named, inasmuch as not only the name, but also the definition, is the same in both cases (Aristotle, Categoriae 1a8-10)
English (LSJ)
οἱ,
A all the Achaeans, Il.2.404, al.: fem. Πᾰνᾰχαιά, ἡ, epith. of Demeter, Paus.7.24.3; of Artemis, BCH25.350 (Delph.):— also Πᾰνᾰχαιὶς γῆ, all Achaea, A.R.1.243; Πᾰνᾰχαιίς, epith. of Athena, Paus. 7.20.2.