συνεργία
From LSJ
ἡμῶν δ' ὅσα καὶ τὰ σώματ' ἐστὶ τὸν ἀριθμὸν καθ' ἑνός, τοσούτους ἔστι καὶ τρόπους ἰδεῖν → whatever number of persons there are, the same will be found the number of minds and of characters
English (LSJ)
ἡ,
A co-operation, Arist.Pr.876b15, Plb.8.33.10; εἰς τὸν βίον, πρὸς τοὺς πολέμους, Phld.Rh.1.270 S., Mus. p.69 K.: also συνέργεια, UPZ36.14 (ii B.C.), Gal. 19.472: pl., Arist. Oec.1343b17 (-ίαι, v.l. -είαι). II conspiracy, collusion, D.56.8; περί τι Din.1.112.