dockhand vs dock worker

dockhand and dock worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
dockhand	Yes	No	No	No
dock worker	Yes	No	No	No

As nouns, dockhand and dock worker are synonyms defined as:

dockhand and dock worker: a laborer who loads and unloads vessels in a port

Other synonyms of dockhand include dock-walloper, docker, dockworker, loader, longshoreman, lumper, stevedore.

dockhand (noun)	dock worker (noun)
a laborer who loads and unloads vessels in a port	a laborer who loads and unloads vessels in a port