| cooperate(play, participate) |
| coordinate(play, participate, cooperate) |
| espouse(play, participate, cooperate) |
| forward(play, participate, cooperate) |
| further(play, participate, cooperate) |
| go along with(expression, idiom, play, participate, cooperate) |
| have a hand in(expression, idiom, play, participate, cooperate) |
| help(play, participate, cooperate) |
| join forces(expression, play, participate, cooperate) |
| join in(expression, play, participate, cooperate) |
| league(play, participate, cooperate) |
| lend a hand(expression, idiom, play, participate, cooperate) |
| make appearance(expression, play, enter) |
| opt in(expression, play, participate, cooperate) |
| participate(play, cooperate) |
| partner(play, participate, cooperate) |
| pitch in(expression, play, participate, cooperate) |
| play ball(expression, play, participate, cooperate) |
| play part(expression, enter, oblige) |
| pool resources(expression, play, participate, cooperate) |