squanderer vs waster

squanderer and waster both are nouns.

Word	Noun	Adjective	Verb	Adverb
squanderer	Yes	No	No	No
waster	Yes	No	No	No

As nouns, waster is a hyponym of squanderer; that is, waster is a word with a more specific, narrower meaning than squanderer:

Other hyponyms of squanderer include scattergood, spend-all, spender, spendthrift, wastrel.

squanderer (noun)	waster (noun)
a recklessly extravagant consumer	someone who dissipates resources self-indulgently
	a person who destroys or ruins or lays waste to