A few years ago, there was a study conducted on ToTs, tip-of-the-tongue that concluded that the phenomenon was when the brain knew the word but couldn't access the proper phonemes the word had to vocalize the word. One popular strategy to resolving this problem that I personally use is to run through the alphabet in my head until something clicks. A better solution would be to memorize a short phrase with every phoneme in English within it.
The good cat just found grizzly bear poo.
Sharks having lawyers chose, why marry you?
Not quite perfect, but most are there. Actually kind of hard to make one up. Rhyming would help, but a needed part of rhyming is to introduce a duplicate phoneme.