gigolo vs lizard

gigolo and lizard both are nouns.

Word	Noun	Adjective	Verb	Adverb
gigolo	Yes	No	No	No
lizard	Yes	No	No	No

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

gigolo: a man who has sex with and is supported by a woman
lizard: a man who idles about in the lounges of hotels and bars in search of women who would support him

Other hyponyms of gigolo include lounge lizard.

gigolo (noun)	lizard (noun)
a man who has sex with and is supported by a woman	relatively long-bodied reptile with usually two pairs of legs and a tapering tail
	a man who idles about in the lounges of hotels and bars in search of women who would support him