gigolo vs lounge lizard

gigolo and lounge lizard both are nouns.

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

As nouns, lounge lizard is a hyponym of gigolo; that is, lounge 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
lounge 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 lizard.

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