I enjoy creating symbiotograms, an ambigram that, when rotated 180 degrees reads as a different word from the original. Usually they are random words that are related, like synonyms or antonyms, or someone's first and last name or nickname. This is an example of a symbiotogram I made for a friend of mine. I designed it so when his first name was flipped 180 degrees it spells out his last name. When placed over each other it forms his full name when viewed 'regularly' and when flipped 180 degrees.