In Free Dordle, where I can play more, I created a "house rule" that, after successfully finding the words in one Dordle, you must use both of those words for your first two words in the next. I play to "chain" Dordles together, and this has an impact on difficulty.
For example, if I guessed correctly that the words were TIDAL & DAILY, using those two words to start my next Dordle could be more disadvantageous than a combination like STONE & GUARD, because the first pairing has 6 unique letters while the second pairing has 10. (However, TIDAL & DAILY might not be that bad, if the combination helps identify the positioning of T, I, D, and/or A.)
Generally, the result is an easy word combo with many common letters becomes a disadvantage for your next game, while a hard word combo might help rule in/out more letters.