blaspheme vs swear

blaspheme and swear both are verbs.

Word	Noun	Adjective	Verb	Adverb
blaspheme	No	No	Yes	No
swear	No	No	Yes	No

As verbs, blaspheme and swear are synonyms defined as:

Other synonyms of blaspheme include curse, cuss, imprecate.

blaspheme (verb)	swear (verb)
utter obscenities or profanities	have faith or confidence in
speak of in an irreverent or impious manner	make a deposition; declare under oath
	utter obscenities or profanities
	promise solemnly; take an oath
	to declare or affirm solemnly and formally as true