crossbreed

To produce (an organism) by the mating of individuals of different breeds, varieties, or species; hybridize.

Recalling the crossbreeding of the lakeside daisy, he insists, "If we hadn't polluted that population with Ohio plants it might have vanished.

To mate so as to produce a hybrid; interbreed.

To mate (an organism) with another organism so as to produce a hybrid.

An organism produced by mating of individuals of different varieties or breeds.

When I ask about these dogs, they are described to me as the local mutts, mongrels, pavement specials, crossbreeds.