relative, relation -- (a person related by blood or marriage; "police are searching for relatives of the deceased"; "he has distant relations back in New Jersey")
relative, congener, congenator, congeneric -- (an animal or plant that bears a relationship to another (as related by common descent or by membership in the same genus))
Overview of adj relative
The adj relative has 2 senses
relative, comparative -- (estimated by comparison; not absolute or complete; "a relative stranger")
proportional, relative -- (properly related in size or degree or other measurable characteristics; usually followed by `to'; "the punishment ought to be proportional to the crime"; "earnings relative to production")