Maybe you could do something with 2 words that are short, easy to spell, easy to pronounce, and memorable. I was able to register an 8 letter .com like that (2x 4-letter words) a couple years ago.
Yup! I mentioned this in a previous comment but I'm thinking of training a deep learning model on the top 10,000 startup names and use it to generate available .com domain names that could potentially be in the format of a two-word domain too! Not sure how feasible this is gonna be but I'm definitely gonna give it a try!