fireman vs laborer

fireman and laborer both are nouns.

Word	Noun	Adjective	Verb	Adverb
fireman	Yes	No	No	No
laborer	Yes	No	No	No

As nouns, laborer is a hypernym of fireman; that is, laborer is a word with a broader meaning than fireman:

fireman: a laborer who tends fires (as on a coal-fired train or steamship)
laborer: someone who works with their hands; someone engaged in manual labor

Other hypernyms of fireman include jack, labourer, manual laborer.

fireman (noun)	laborer (noun)
play in which children pretend to put out a fire	someone who works with their hands; someone engaged in manual labor
a member of a fire department who tries to extinguish fires
a laborer who tends fires (as on a coal-fired train or steamship)
a pitcher who does not start the game