Synonyms of mongrel
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crossSomething that is a cross between two things is neither one thing nor the other, but a mixture of both.
• a cross between a collie and a poodle
hybridA hybrid is an animal or plant that has been bred from two different species of animal or plant.
• a hybrid between watermint and spearmint • best champion Mule or Hybrid
Thesaurus for mongrel from the Collins English Thesaurus
a plant or animal, esp a dog, of mixed or unknown breeding; a crossbreed or hybrid