As verbs the difference between trouping and grouping
is that trouping is present participle of lang=en while grouping is present participle of lang=en.
As a noun grouping is
a collection of things or people united as a group.
grouping
English
Noun
(
en noun)
A collection of things or people united as a group.
The action of the verb to group .
Verb
(head)