dockworker vs docker

dockworker and docker both are nouns.

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

As nouns, dockworker and docker are synonyms defined as:

dockworker and docker: a laborer who loads and unloads vessels in a port

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

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