linger vs lounge

linger is not a noun while lounge is a noun.

Word	Noun	Adjective	Verb	Adverb
linger	No	No	Yes	No
lounge	Yes	No	Yes	No

As verbs, linger and lounge are synonyms defined as:

linger (noun)	lounge (noun)
	a room (as in a hotel or airport) with seating where people can wait
	an upholstered seat for more than one person

linger (verb)	lounge (verb)
take one's time; proceed slowly	sit or recline comfortably
leave slowly and hesitantly	be about a place without any apparent purpose
be about a place without any apparent purpose
to hang about in a place beyond the proper or usual time
remain present although waning or gradually dying