assembly, aggregation
The word is impede.
The word is assassination.
*
enjoyable
A word relating to animals is Zoology.
Party is a synonym for group.
An instigator.
entourage
Category.
The word is exodus.
i don't know it but it starts with n
Altruist
civilization crowd
Plentiful
The word is mob. It means a large crowd of people.
For people... congregation, crowd, clique perhaps.
cathedralas in Westminster Cathedral in Londonfor example