lumper vs dock-walloper

lumper and dock-walloper both are nouns.

Word	Noun	Adjective	Verb	Adverb
lumper	Yes	No	No	No
dock-walloper	Yes	No	No	No

As nouns, lumper and dock-walloper are synonyms defined as:

lumper and dock-walloper: a laborer who loads and unloads vessels in a port

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

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