In the U.K. a small group of trees is a 'copse', a slightly larger group is a 'woodland/woods'. and a very large group of trees is a 'forest'.
Well another name for tree is in spanish arbol
another word for large group is clan.
choir or orchestra is another word for music group
Another word for gather or collect is... handle or group together.
Another word for religious group could be "faith community" or "religious organization."
trees are so cool
Another word for study group is "learning circle" or "study session".
faction clique
a group of trees is called a forest of trees
group
A group of witches is a coven.
Clear Cutting Trees