baptism vs aspersion

baptism and aspersion both are nouns.

Word	Noun	Adjective	Verb	Adverb
baptism	Yes	No	No	No
aspersion	Yes	No	No	No

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

Other hyponyms of baptism include affusion, sprinkling, christening, immersion.

baptism (noun)	aspersion (noun)
a Christian sacrament signifying spiritual cleansing and rebirth	an abusive attack on a person's character or good name
	the act of sprinkling water in baptism (rare)
	a disparaging remark