longshoreman vs dock-walloper

longshoreman and dock-walloper both are nouns.

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

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

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

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

longshoreman (noun)	dock-walloper (noun)
a laborer who loads and unloads vessels in a port	a laborer who loads and unloads vessels in a port