Subvened :: Subvariety (n.) A subordinate variety, or a division of a variety..
Subventaneous :: Subvene (v. i.) To come under, as a support or stay; to happen..
Subvention :: Subvention (n.) The act of relieving, as of a burden; support; aid; assistance; help..
Subventitious :: Subventionize (v. t.) To come to the aid of; to subsidize; to support.