When everyone in a group looks, talks and dresses the same, this is an example of a group that would be described as homogenous.
- having similarity in structure because of common descent
Origin of homogenoushomo- + -genous
Origin of homogenousAlteration of homogeneous (probably influenced by homogenize).
(comparative more homogenous, superlative most homogenous)
According to The Oxford Guide to English Usage, 'homogenous' is a frequent error for homogeneous.
Prefix homo- + gene + -ous