Apart from ABD, there are other acronyms that are used to describe a person who has not completed their PhD. Here are some of them:

1. BDT – “Bachelor, Doctorate, Truncatus” or “Bachelor, Doctorate, Truncated” ¹.
2. CDB – “Coursework Done But” ¹.
3. CQ – “Candidate for Qualification” ¹.
4. DNP – “Did Not Proceed” ¹.
5. DQ – “Doctoral Qualifier” ¹.
6. PhDc – “PhD candidate” ².

I hope this helps!