decree vs overturn

decree and overturn both are nouns.

Word	Noun	Adjective	Verb	Adverb
decree	Yes	No	Yes	No
overturn	Yes	No	Yes	No

As verbs, overturn is a hyponym of decree; that is, overturn is a word with a more specific, narrower meaning than decree:

Other hyponyms of decree include override, overrule, overthrow, reverse, rule in, rule out.

decree (noun)	overturn (noun)
a legally binding command or decision entered on the court record (as if issued by a court or judge)	the act of upsetting something
	an improbable and unexpected victory

decree (verb)	overturn (verb)
decide with authority	change radically
issue a decree	rule against
	cancel officially
	turn from an upright or normal position
	cause to overturn from an upright or normal position
	cause the downfall of; of rulers