Discussion Forum—A Way with Words, a fun radio show and podcast about language

Not too long ago, for no particular reason, I was trying to think of a word that when spelled backwards, forms an antonym of the original word.

The closest thing I could come up with is "draw," as in 'to draw in' and "ward," as in 'to ward off.'

Another pair would be "ohm," an electrical measure of resistance, and "mho," an electrical measure of conductance. I don't count this pair because the word "mho" was deliberately created by reversing the word "ohm"

Can anyone think of any others?