group

nouns

any number of entities (members) considered as a unit
group, grouping
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule
chemical group, group, radical
a set that is closed, associative, has an identity element and every element has an inverse
group, mathematical group

verbs

arrange into a group or groups
"Can you group these shapes together?"
group
is derived from
grouping
is a type of (narrower)
arrange or order by classes or categories
"How would you classify these pottery shards--are they prehistoric?"
assort, class, classify, separate, sort, sort out
form a group or group together
aggroup, group
is derived from
grouping