canonical hour vs sext

canonical hour and sext both are nouns.

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

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

canonical hour: (Roman Catholic Church) one of seven specified times for prayer
sext: the fourth of the seven canonical hours; about noon

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

canonical hour (noun)	sext (noun)
(Roman Catholic Church) one of seven specified times for prayer	A message with sexual content
	the fourth of the seven canonical hours; about noon