lounger vs idler

lounger and idler both are nouns.

Word	Noun	Adjective	Verb	Adverb
lounger	Yes	No	No	No
idler	Yes	No	No	No

As nouns, idler is a hypernym of lounger; that is, idler is a word with a broader meaning than lounger:

Other hypernyms of lounger include bum, do-nothing, layabout, loafer.

lounger (noun)	idler (noun)
an armchair whose back can be lowered and foot can be raised to allow the sitter to recline in it	person who does no work
an article of clothing designed for comfort and leisure wear
someone who wastes time