commensurate
From LSJ
οἵ γε καὶ ἐν τῷ παρόντι ἀντιπάλως μᾶλλον ἢ ὑποδεεστέρως τῷ ναυτικῷ ἀνθώρμουν → whose navy, even as it was, faced the Athenian more as an equal than as an inferior
equal: P. and V. ἴσος, ὅμοιος, ἰσόρροπος, P. ἰσοπαλής, ἀντίπαλος.