"Geheiratet." Nein. "Verheiratet." Ich weiss es nicht!
I know how it goes, these two can be really tricky, however they are similar enough to English that you can learn a couple of associations to help you keep them apart in your mind.
Sometimes you simply need rote memorization, and sometimes you need a way of remembering which one is which. Sometimes this is an Eselsbrücke (a "donkey-bridge" or a mnemonic device), sometimes you need an association, and sometimes you need a picture in your mind.
Read on to learn a few techniques to tell "geheiratet" and "verheiratet" apart and keep them apart!