Adverb
sure as death (not comparable)
(simile) Most certainly.
No matter what heights you achieve, even if you're Brad Pitt, the slide is coming, sure as death and taxes. James Caan
Foolish men imagine that because judgment for an evil thing is delayed, there is no justice; but only accident here below. Judgment for an evil thing is many times delayed some day or two, some century or two, but it is sure as life, it is sure as death. Thomas Carlyle
Another thing which is about as sure as death and taxes, is that no man can go on bluffing indefinitely without being called. E. W. Howe