1) Breed 2) Cross 3) Crossbreed 4) Hybridise 5) Interbreed 1) Cross 2) Hybridise 3) Interbreed 
• (v. t.) To render hybrid; to produce by mixture of stocks. • (v. i.) To produce hybrid offspring; to interbreed; to cross.
To produce offspring from two different species.
Hy'brid·i`ze transitive verb [ imperfect & past participle Hybridized ; present participle & verbal noun Hybridizing .] To render hybrid; to produce by mixture of stocks. Hy'brid·ize intransitive verb (Biol.) To produce hybrid offspring; to interbreed; to cross.