dockhand vs docker

dockhand and docker both are nouns.

Word	Noun	Adjective	Verb	Adverb
dockhand	Yes	No	No	No
docker	Yes	No	No	No

As nouns, dockhand and docker are synonyms defined as:

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

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