waterman vs gondoliere

waterman and gondoliere both are nouns.

Word	Noun	Adjective	Verb	Adverb
waterman	Yes	No	No	No
gondoliere	Yes	No	No	No

As nouns, gondoliere is a hyponym of waterman; that is, gondoliere is a word with a more specific, narrower meaning than waterman:

Other hyponyms of waterman include canoeist, paddler, ferryman, gondolier, rower, punter.

waterman (noun)	gondoliere (noun)
someone who drives or rides in a boat	a (Venetian) boatman who propels a gondola