swear vs bet

swear is not a noun while bet is a noun.

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

As verbs, swear and bet are synonyms defined as:

Other synonyms of swear include bank, calculate, count, depend, look, reckon, rely.

swear (noun)	bet (noun)
	the act of gambling
	the money risked on a gamble

swear (verb)	bet (verb)
have faith or confidence in	have faith or confidence in
make a deposition; declare under oath	maintain with or as if with a bet
utter obscenities or profanities	stake on the outcome of an issue
promise solemnly; take an oath
to declare or affirm solemnly and formally as true