lumper vs labourer

lumper and labourer both are nouns.

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

As nouns, labourer is a hypernym of lumper; that is, labourer is a word with a broader meaning than lumper:

lumper: a laborer who loads and unloads vessels in a port
labourer: someone who works with their hands; someone engaged in manual labor

Other hypernyms of lumper include jack, laborer, manual laborer.

lumper (noun)	labourer (noun)
a taxonomist who classifies organisms into large groups on the basis of major characteristics	someone who works with their hands; someone engaged in manual labor
a laborer who loads and unloads vessels in a port