Altruist
Putting the cart before the horse means doing things in the wrong order.
Party is a synonym for group.
Putting the cart before the horse means doing things in the wrong order.
Rehearse-means practice.you would rehearse a play before putting on a public performance.
assembly, aggregation
An instigator.
It means the same as putting the horse before the cart, i.e. doing things in the wrong order.
entourage
Category.
civilization crowd
For people... congregation, crowd, clique perhaps.
Regrouping simply means putting the 2+ answers into a group and subtracting all the answers together.