enactment vs fiat

enactment and fiat both are nouns.

Word	Noun	Adjective	Verb	Adverb
enactment	Yes	No	No	No
fiat	Yes	No	No	No

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

enactment: a legal document codifying the result of deliberations of a committee or society or legislative body
fiat: a legally binding command or decision entered on the court record (as if issued by a court or judge)

Other hyponyms of enactment include nullity, decree, edict, order, rescript, legislative act, statute.

enactment (noun)	fiat (noun)
acting the part of a character on stage; dramatically representing the character by speech and action and gesture	a legally binding command or decision entered on the court record (as if issued by a court or judge)
the passing of a law by a legislative body
a legal document codifying the result of deliberations of a committee or society or legislative body