placation vs propitiation

placation and propitiation both are nouns.

Word	Noun	Adjective	Verb	Adverb
placation	Yes	No	No	No
propitiation	Yes	No	No	No

As nouns, placation and propitiation are synonyms defined as:

placation and propitiation: the act of placating and overcoming distrust and animosity

Other synonyms of placation include conciliation.

placation (noun)	propitiation (noun)
the act of placating and overcoming distrust and animosity	the act of placating and overcoming distrust and animosity
	the act of atoning for sin or wrongdoing (especially appeasing a deity)