lingerer vs dawdler

lingerer and dawdler both are nouns.

Word	Noun	Adjective	Verb	Adverb
lingerer	Yes	No	No	No
dawdler	Yes	No	No	No

As nouns, dawdler is a hypernym of lingerer; that is, dawdler is a word with a broader meaning than lingerer:

lingerer: someone who lingers aimlessly in or about a place
dawdler: someone who takes more time than necessary; someone who lags behind

Other hypernyms of lingerer include drone, laggard, lagger, poke, trailer.

lingerer (noun)	dawdler (noun)
someone who lingers aimlessly in or about a place	someone who takes more time than necessary; someone who lags behind