coact[verb]Synonyms: interact, interplay, interreact
 [TahlilGaran] English Synonym Dictionary ▲
 coact II. 3.  verb trans. Enact together. 
rare. Only in 
L16.4.  verb intrans. Act together, cooperate. 
E17. ■   coaction noun (a) (now 
rare) compulsion, restraint, coercion; 
(b) concerted action, acting together: 
LME.  [TahlilGaran] English Dictionary ▲