συνέμπτωσις
From LSJ
θεοῦ θέλοντος κἂν ἐπὶ ῥιπὸς πλέοις → if God willed it, you could sail even on a straw mat | God willing, you may voyage on a mat
English (LSJ)
εως, ἡ,
A formal coincidence, [μέτρων] Sch.Heph.p.154 C.; σ. Σοφοκλεῖ καὶ Εὐριπίδῃ a coincidence (of language) between . ., Sch.Ar.Th. 21; σ. ἱστορική Ptol.Heph. ap. Phot.Bibl.p.148 B. II in Gramm., similarity of form, A.D.Pron.52.5, al.; τόνου Id.Adv.155.13.
German (Pape)
[Seite 1014] ἡ, Zusammenfallen, -treffen, Eust.