dawdler vs idler

dawdler and idler both are nouns.

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

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

dawdler: someone who takes more time than necessary; someone who lags behind
idler: person who does no work

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

dawdler (noun)	idler (noun)
someone who takes more time than necessary; someone who lags behind	person who does no work