dockhand vs lumper

dockhand and lumper both are nouns.

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

As nouns, dockhand and lumper are synonyms defined as:

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

dockhand (noun)	lumper (noun)
a laborer who loads and unloads vessels in a port	a taxonomist who classifies organisms into large groups on the basis of major characteristics
	a laborer who loads and unloads vessels in a port