benediction vs supplication

benediction and supplication both are nouns.

Word	Noun	Adjective	Verb	Adverb
benediction	Yes	No	No	No
supplication	Yes	No	No	No

As nouns, supplication is a hypernym of benediction; that is, supplication is a word with a broader meaning than benediction:

benediction: the act of praying for divine protection
supplication: the act of communicating with a deity (especially as a petition or in adoration or contrition or thanksgiving)

Other hypernyms of benediction include prayer.

benediction (noun)	supplication (noun)
the act of praying for divine protection	the act of communicating with a deity (especially as a petition or in adoration or contrition or thanksgiving)
a ceremonial prayer invoking divine protection	a prayer asking God's help as part of a religious service
	a humble request for help from someone in authority