canonical hour vs nones

canonical hour and nones both are nouns.

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

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

canonical hour: (Roman Catholic Church) one of seven specified times for prayer
nones: the fifth of the seven canonical hours; about 3 p.m.

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

canonical hour (noun)	nones (noun)
(Roman Catholic Church) one of seven specified times for prayer	the fifth of the seven canonical hours; about 3 p.m.