bargee
to swear like a bargee

blind
to swear blind that...

fealty
to swear fealty to

stick
he can swear a good stick

swear
to swear an oath

swear by
to swear by somebody

swear in
to swear in a witness

swear off
to swear off drink

swear to
to swear somebody to secrecy

trooper
to swear like a trooper

vengeance
to swear vengeance against somebody