potterer vs lagger

potterer and lagger both are nouns.

Word	Noun	Adjective	Verb	Adverb
potterer	Yes	No	No	No
lagger	Yes	No	No	No

As nouns, lagger is a hypernym of potterer; that is, lagger is a word with a broader meaning than potterer:

Other hypernyms of potterer include dawdler, drone, laggard, poke, trailer.

potterer (noun)	lagger (noun)
a person who putters about	someone who takes more time than necessary; someone who lags behind