Hydraulic engineering is a branch of civil engineering that deals with the flow and conveyance of fluids, primarily water and sewage.

He suffers from Jekyll-Hyde syndrome.

She has a Jekyll/Hyde syndrome, sometimes she's really nice and other times she's really mean.

I saw two hydrophobia cats in the alley.

There are many hydrophobia skunks in the forest.

I have a hydrophobia cat.

I encountered a skunk while hiking in the desert, and its hydrophobia was evident as it avoided the water.

Scientists are studying the properties of metallic hydrogen.

Dark hydrogen is a hypothetical form of hydrogen that is believed to exist in the universe.

Alkaline hydrolysis is a process used to decompose organic materials.