From a first skimming of the questions, it looks like some of them might mean some keyword/constant named
AES_ENCRYPT (in PHP?), and some other want actually specify that they are about the encryption instead of decryption part. (There is no aes-decrypt, though.) Most of them simply mean "I want to encrypt using the AES algorithm".
I think this could be merged to aes without any losses.
There is also aes256, which is about the medium-key-length variant of AES (other variants are the common AES-128 and the "very-high-security" AES-512 - but there are no tags for them). 8 of them are also tagged aes (and 3 aes-encrypt, one question has all three tags.)
Some of them are actually about the 256-bit variant, others would be the same for any AES variant (or in fact for any block cipher algorithm).
Myself having only a score of 3 in the aes tag, I can't propose these synonyms for the experts to approve, so I'm calling for help here.
Hmm, I should not post support requests on friday evening, they tend to fall down.