In or into a single group, mass, or place. (we gather together)
In or into contact. (the cars crashed together)
In association with, or in relationship with one another, mutually or reciprocally. (getting along together)
By joint or cooperative effort. (we ironed the entire load of clothes together)
Regarded collectively, in total. (she is worth more than all of us together)
In a unified structure or arrangement.
In harmony or accord.
An effective, coherent condition. (get yourself together)
Joint = shared, combined, common, communal, concerted, conjunct, consolidated, intermutual, united.
Allied = affiliated, akin, amalgamted, associated, bound, cognate, combined, confederate, connected, friendly, in league, kindred, linked, married, related, unified, wed.