| concur(verb, meet, join, link, connect) |
| conspire(verb, plan, scheme, plot, cooperation) |
| corporate(adjective, united, allied) |
| federal(adjective, united, allied, confederated) |
| federated(adjective, united, allied) |
| unify(verb, meet, join, link, connect) |
| co-conspirator(noun, aid, supporter, subordinate, assistant) |
| coadjutor(noun, help, associate, supporter, subordinate) |
| concert |
| confederated |
| confederative |
| consort(noun, verb, join, unite, combine) |
| cooperate(verb, meet, plan, join, link) |
| cooperator(noun, associate, supporter, subordinate, friend) |
| crony(noun, guide, associate, companion, friend) |
| incorporated(adjective, united, allied) |
| join forces(verb, expression, idiom, meet, join) |
| leagued(adjective, united, allied) |
| pool(verb, meet, join, link, connect) |
| team up(verb, expression, join, unite, combine) |