13-Letter Words Containing: I,G,A,N,D,R,Y

• To introduce a hydroxyl group into a compound

• the process whereby hydrocarbon molecules of petroleum are broken down into kerosene and gasolene by the addition of hydrogen under high pressure in the presence of a catalyst

• To treat something, or react something, with hydrogen; especially to react an unsaturated fat with hydrogen, in the presence of a nickel catalyst, to produce a harder saturated fat

• in a disparaging manner

• a chemical process that adds hydrogen atoms to an unsaturated oil