13-Letter Words Containing: H,K,O,R

• 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

• a board having 64 squares of two alternating colors

• the fruit of the chokecherry tree

• a common wild cherry of eastern North America having small bitter black berries favored by birds

• someone who travels for pleasure

• a check that restrains another check

• something that checks the correctness of a previous check

• oppose or check by a counteraction

• check a second time

• a productive insight

• making an important discovery

• a penetration of a barrier such as an enemy's defense

• the administration of a strong electric current that passes through the brain to induce convulsions and coma

• a telephone with a microphone and loudspeaker; can be used without picking up a handset; several people can participate in a call at the same time