undoer vs waster

undoer and waster both are nouns.

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

As nouns, undoer and waster are synonyms defined as:

Other synonyms of undoer include destroyer, ruiner, uprooter.

undoer (noun)	waster (noun)
a person who destroys or ruins or lays waste to	someone who dissipates resources self-indulgently
a person who unfastens or unwraps or opens	a person who destroys or ruins or lays waste to
a seducer who ruins a woman