undo vs unmake

undo and unmake both are verbs.

Word	Noun	Adjective	Verb	Adverb
undo	No	No	Yes	No
unmake	No	No	Yes	No

As verbs, undo and unmake are synonyms defined as:

undo (verb)	unmake (verb)
cancel, annul, or reverse an action or its effect	deprive of certain characteristics
cause to become loose
remove the outer cover or wrapping of
deprive of certain characteristics
cause the ruin or downfall of