Earlier quoted context omitted.
Done. Moved my score from the 54th percentile to 98th percentile. My words: Cannabinol, idempotence, median, mitosis, infrared, soufflé, synonym, genomics, tortoiseshell, crankshaft.
I managed 76.4% with the super unrelated words flag, buttress, tower, stables, kitchen, dungeon, portcullis, throne, keep, castle [edit] tweaked it a bit to make the score higher after I realized the form always drops the 10th word :-)
Did you mean to say that these were all super related, not unrelated, words?
Crenel, buttress, hearth, stables, dungeon, gargoyle, throne, flag are all words relating to castles - some like crenel, explicitly so.
Edit: and in your updated wordlist, you just swapped one castle-specific term, 'crenel', for another, 'portcullis'...