dock worker vs dockworker

dock worker and dockworker both are nouns.

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

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

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

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

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