govern vs dictate

govern is not a noun while dictate is a noun.

Word	Noun	Adjective	Verb	Adverb
govern	No	No	Yes	No
dictate	Yes	No	Yes	No

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

Other hyponyms of govern include throne, misgovern, reign.

govern (noun)	dictate (noun)
	a guiding principle
	an authoritative rule

govern (verb)	dictate (verb)
exercise authority over; as of nations	say out loud for the purpose of recording
direct or strongly influence the behavior of	issue commands or orders for
bring into conformity with rules or principles or usage; impose regulations	rule as a dictator
require to be in a certain grammatical case, voice, or mood