Words similar to swear

Example sentences for: swear

How can you use “swear” in a sentence? Here are some example sentences to help you improve your vocabulary:

He recounts the story of Sir Thomas More, who chose to be beheaded rather than swear an oath he did not believe.
I swear, I am still so surprised when people or institutions lie like that.
When will someone within earshot confuse swear by and swear at ?
But KSM states he refused to swear a formal oath of allegiance to Bin Ladin, thereby retaining a last vestige of his cherished autonomy.
I swear!"