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

• 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

• photosynthetic or plant constituent of plankton; mainly unicellular algae

• a board having 64 squares of two alternating colors

• someone who travels for pleasure

• a productive insight

• making an important discovery

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

• a building where foodstuffs are processed and packed

• a plant where livestock are slaughtered and processed and packed as meat products