improvement vs transmutation

improvement and transmutation both are nouns.

Word	Noun	Adjective	Verb	Adverb
improvement	Yes	No	No	No
transmutation	Yes	No	No	No

As nouns, transmutation is a hypernym of improvement; that is, transmutation is a word with a broader meaning than improvement:

Other hypernyms of improvement include shift, transformation.

improvement (noun)	transmutation (noun)
the act of improving something	an act that changes the form or character or substance of something
a change for the better; progress in development	a qualitative change
a condition superior to an earlier condition	(physics) the change of one chemical element into another (as by nuclear decay or radioactive bombardment)