docker vs dock worker

docker and dock worker both are nouns.

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

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

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

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

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