aggroup vs group

aggroup is not a noun while group is a noun.

Word	Noun	Adjective	Verb	Adverb
aggroup	No	No	Yes	No
group	Yes	No	Yes	No

As verbs, aggroup and group are synonyms defined as:

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

aggroup (verb)	group (verb)
form a group or group together	arrange into a group or groups
	form a group or group together