canonical hour vs prime

canonical hour and prime both are nouns.

Word	Noun	Adjective	Verb	Adverb
canonical hour	Yes	No	No	No
prime	Yes	Yes	Yes	No

As nouns, prime is a hyponym of canonical hour; that is, prime is a word with a more specific, narrower meaning than canonical hour:

canonical hour: (Roman Catholic Church) one of seven specified times for prayer
prime: the second canonical hour; about 6 a.m.

Other hyponyms of canonical hour include matins, morning prayer, terce, tierce, sext, nones, evensong, vespers, complin, compline.

canonical hour (noun)	prime (noun)
(Roman Catholic Church) one of seven specified times for prayer	a natural number that has exactly two distinct natural number divisors: 1 and itself
	the time of maturity when power and vigor are greatest
	the second canonical hour; about 6 a.m.
	the period of greatest prosperity or productivity

canonical hour (adjective)	prime (adjective)
	of or relating to or being an integer that cannot be factored into other integers
	being at the best stage of development
	of superior grade
	used of the first or originating agent
	first in rank or degree

canonical hour (verb)	prime (verb)
	insert a primer into (a gun, mine, or charge) preparatory to detonation or firing
	fill with priming liquid
	cover with a primer; apply a primer to