Noun
a sexual attraction to (or sexual relations with) persons of the same sex
Source: WordNetOnce I appealed to distinguish words "gay" and "homosexual"... "Gayship" is a political homosexualism, a sort of left-wing ideology based on a bias against traditional lifestyle... Homosexualism is a sexual preference. Rafał A. Ziemkiewicz
"A Not-So-Vast Left Wing Conspiracy and the Selling of Homosexualism" are much less amusing than you'd like them to be. Source: Internet