throw in with (?.)
- act with
- affiliate
- align with
- ally
- associate
- band together
- be in cahoots
- bunch
- bunch up
- cabal
- cement a union
- centralize
- club
- club together
- come together
- confederate
- consociate
- conspire
- couple
- federalize
- federate
- flock to
- gang
- gang up
- get together with
- go along with
- go in partners
- go in partnership
- go in with
- hook up with
- join
- join forces
- join fortunes with
- join hands with
- join together
- join up with
- join with
- league
- line up with
- marry
- organize
- pair
- pair off
- partner
- rally round
- range with
- side with
- stand in with
- stand together
- stand up with
- strike in with
- string along with
- swing in with
- take part with
- take sides with
- team up with
- team with
- tie in with
- tie up with
- unionize
- unite with
- wed
