adjourn vs prorogue

adjourn and prorogue both are verbs.

Word	Noun	Adjective	Verb	Adverb
adjourn	No	No	Yes	No
prorogue	No	No	Yes	No

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

adjourn: break from a meeting or gathering
prorogue: adjourn by royal prerogative; without dissolving the legislative body

adjourn (verb)	prorogue (verb)
close at the end of a session	adjourn by royal prerogative; without dissolving the legislative body
break from a meeting or gathering	hold back to a later time