congener

Etymology

From French congénère, from Latin com- (“same”) + genus (“kind”).

noun

1. A plant or animal of the same taxonomic genus as another.
2. A person or thing similar in behavior or nature to another.
   Not that we may thereby swamp the thing in the wholesale condemnation which we pass on its inferior congeners, but rather that we may by contrast ascertain the more precisely in what its merits consist, by learning at the same time to what particular dangers of corruption it may also be exposed. 1902, William James, The Varieties of Religious Experience, Lecture I
3. (chemistry) Any of a group of structurally related compounds.
4. Any of several alcohols, other than ethanol, that are found in fermented and distilled alcoholic drinks, and are partially responsible for their flavour and character.