9-Letter Words Containing: I,R,Y

• breed animals or plants using parents of different races and varieties

• surgical procedure in which spinal nerve roots are cut; done (anterior roots) to relieve intractable pain or (posterior roots) to stop severe muscle spasms

• any of a class of organic compounds sharing a common functional group characterized by a nitrogen to nitrogen covalent bond with 4 substituents with at least one of them being an acyl group.

• a colorless fuming corrosive liquid; a powerful reducing agent; used chiefly in rocket fuels

• A fragment of RNA that can act as an enzyme.