ethnology

As an adjective ethnographic

is relating to ethnography.

As a noun ethnology is

(anthropology) the branch of anthropology that studies and compares the different human cultures.

As nouns the difference between taxonomy and ethnology

is that taxonomy is the science or the technique used to make a classification while ethnology is (anthropology) the branch of anthropology that studies and compares the different human cultures.

As nouns the difference between ethnology and sociology

is that ethnology is the branch of anthropology that studies and compares the different human cultures while sociology is the study of society, human social interaction and the rules and processes that bind and separate people not only as individuals, but as members of associations, groups and institutions.