WordNet sense 1 (a word that is composed of parts from different languages (e.g., `monolingual' has a Greek prefix and a Latin root)):

loanblend, loan-blend

WordNet sense 2 (produced by crossbreeding):

interbred, crossed, intercrossed

WordNet sense 3 (bred from a mixture of breeds or strains):

crossbred

WordNet sense 4 (an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species):

cross, crossbreed