slowcoach vs dawdler

slowcoach and dawdler both are nouns.

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

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

slowcoach: someone who moves slowly
dawdler: someone who takes more time than necessary; someone who lags behind

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

slowcoach (noun)	dawdler (noun)
someone who moves slowly	someone who takes more time than necessary; someone who lags behind