[1] Likewise in the Synagoge (sigma314) and Photius' Lexicon (sigma730 Theodoridis), and cf. already Hesychius sigma2391-2392. The headword is a present active participle, masculine nominative singular, of suna/|dw (contracted form of sunaei/dw). It must be quoted from somewhere; there are numerous possibilities, beginning with Aeschines 2.162. For another form of this verb, see sigma 1607.
[2] Also spelled with double nu, Synnada, as in Stephanus of Byzantium, and so corrected here by Bernhardy: a city of Phrygia Salutaris in Asia Minor.
[3] Addendum lacking, Adler reports, in mss AF.