Spell real words to fight, and the part of speech you cast decides what happens.
Each turn you spell a word from the letters in your hand, and its grammar is its combat effect. Nouns raise a shield, verbs deal damage, adjectives charge up your next verb (sometimes with an element), and prefixes or suffixes multiply the result. Read each enemy's weaknesses and resistances, chain an adjective into a verb for a big elemental strike, and battle your way down a 14-floor gauntlet.
Spelling words from a hand of letters for score is Scrabble's, and the run structure — floors, a growing build, a run that ends — is the roguelike's.
The original idea is what decides a word's effect: its part of speech. Nouns shield, verbs damage, adjectives charge the next verb, and affixes multiply.
That turns grammar into a combat system rather than a scoring table. Scrabble cares only about letters and squares; here a short verb can beat a long noun, so the question stops being which word is worth most and becomes which word does the right thing this turn.
Grammar Gladiator is an original word-game roguelike built in-house, turning vocabulary and parts of speech into a deck-building-style combat run. It's free to play in your browser.