Here's a slight modification of the ACE concept that I ran into recently.

ACE is an acronym for a 3 Melodic Minor, ii-V7-i cadence - in this case E minor - where the ii chord (F#-7b5) is generated from the 6th degree of A Melodic Minor; the V7 (G7alt) from the 7th degree of C Melodic Minor, and the i chord (E-) from E Melodic Minor.

As an acronym, this E minor ii-V7-i is the only key from which an actual word (ACE) can be derived.

For example FAbC, BDF# or C#EG# don't quite cut it as a word, although in each case they spell the 1-b3-5 note names of a minor triad, indicating the trio of Melodic Minor scales that make up the ii-V7-i in that key.

B. Stern