jointly, together, conjointly, in concert, hand in glove, hand and glove, cooperatively, in collaboration, in cooperation, in partnership, side by side, in unison, in league, hand in hand, as one, in combination, shoulder to shoulder, in conjunction, in alliance, arm in arm, collectively, mutually, unitedly, in cahoots, with each other, with one accord, in collusion, in sync, in tandem, in unity, synchronically, as a group, en masse, with one voice, closely, unanimously, altogether, united, synchronously, along, at one and the same time, in harmony, working together, at the same instant, all together, at once, cheek by jowl, in chorus, concurrently, simultaneously … more