[合「あ」]う => To do A together/mutually N4
Secondary Verb
を[機「き」]に => Use A as an opportunity N1
Time, Situation
を[契機「けいき」] => As a good opportunity A, (do) B N2
Information, Report
とはくらべ[物「もの」]にならない => It's no match for A N1
Comparison/ Exchange