| tie in(verb, expression, phrasal verb, develop, secure) |
| tie up with(verb, expression, idiom, phrasal verb, develop) |
| unify(verb, develop, secure, join, unite) |
| wed(verb, join, unite, link, connect) |
| add to(verb, expression, develop, secure, join) |
| affiliate |
| ally |
| ally with |
| amalgamate(verb, develop, secure, join, unite) |
| amass(verb, develop, secure, join, unite) |
| band together |
| be in(verb, follow, enter, cooperate, enlist) |
| bond(verb, join, unite, link, connect) |
| build up(verb, expression, develop, secure, join) |
| cement(verb, develop, secure, join, unite) |
| club |
| coadjute(verb, join, unite, link, connect) |
| coalesce(verb, join, unite, link, connect) |
| combine(verb, join, unite, connect, attach) |
| come aboard(verb, expression, follow, enter, cooperate) |