folk·way 
(fōkwā′)
(fōkwā′)n.
A practice, custom, or belief shared by the members of a group as part of their common culture: studying the folkways of Appalachia.
- hydric
- hydride
- hydrilla
- hydriodic acid
- hydro
- hydro-
- hydrobiological
- hydrobiologist
- hydrobiology
- hydrobromic acid
- hydrobromide
- hydrocarbon
- hydrocarbonaceous
- hydrocarbonic
- hydrocarbonous
- hydrocast
- hydrocele
- hydrocephalic
- hydrocephaloid
- hydrocephalous
- hydrocephalus
- hydrocephaly
- hydrochloric acid
- hydrochloride
- hydrochlorofluorocarbon