Synonyms for sure

adjective having or feeling no doubt or uncertainty; confident and assured

adjective exercising or taking care great enough to bring assurance

adjective certain to occur; destined or inevitable

adjective physically secure or dependable

adjective reliable in operation or effect

adjective (of persons) worthy of trust or confidence

adjective infallible or unfailing

adjective certain not to fail

adjective impossible to doubt or dispute

adverb definitely or positively (`sure' is sometimes used informally for `surely')