1) Associate 2) Cerebrate 3) Cogitate 4) Connect 5) Link 6) Link up 7) Relate 8) Think 9) Tie in 10) To bind or fasten together 11) To tie or bind together Found on https://www.crosswordclues.com/clue/colligate
Col'li·gate transitive verb [ imperfect & past participle Colligated ; present participle & verbal noun Colligating .] [ Latin colligatus , past participle of colligare to collect; co- + ligare to bind.] ... Found on http://www.encyclo.co.uk/webster/C/109