prayer vs deprecation

prayer and deprecation both are nouns.

Word	Noun	Adjective	Verb	Adverb
prayer	Yes	No	No	No
deprecation	Yes	No	No	No

As nouns, deprecation is a hyponym of prayer; that is, deprecation is a word with a more specific, narrower meaning than prayer:

prayer (noun)	deprecation (noun)
the act of communicating with a deity (especially as a petition or in adoration or contrition or thanksgiving)	the act of expressing disapproval (especially of yourself)
earnest or urgent request	a prayer to avert or remove some evil or disaster
a fixed text used in praying
reverent petition to a deity
someone who prays to God