group
noun
°A number of things or persons being in some relation to one another.
"There is a group of houses behind the hill."
°A set with an associative binary operation, under which there exists an identity element, and such that each element has an inverse.
verb
°To put together to form a group.
synonyms: collection, set, band, ensemble more» , amass, categorise, categorize, classify, collect, gather