Well done Marlo-rom Amd congrats on the new arrival!
Thanks also for the mention and smile truly appreciated Prof! (Yes, I do need to get out more....)
Mattrom’s clue had me wondering if there were longer words made up only of two letter US state abbreviations. I didn’t have to look very hard to find this...
At the end it references a publication called “Chambers Back-words” which as far as I can tell no longer seems to be in print. There’s also an intriguing reference to a reverse dictionary complied by the Air Force in the 1960s.