invocation vs supplication

invocation and supplication both are nouns.

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

As nouns, invocation and supplication are synonyms defined as:

invocation and supplication: a prayer asking God's help as part of a religious service

invocation (noun)	supplication (noun)
the act of appealing for help	the act of communicating with a deity (especially as a petition or in adoration or contrition or thanksgiving)
calling up a spirit or devil	a prayer asking God's help as part of a religious service
a prayer asking God's help as part of a religious service	a humble request for help from someone in authority
an incantation used in conjuring or summoning a devil