Solvable rhymes with:
unsolvable, unsolvable, unsolvable, achievable, approvable, believable, conceivable, drivable, forgivable, immovable, inconceivable, livable, lovable, microwavable, movable, observable, provable, receivable, removable, survivable, unbelievable, unforgivable, unlivable, unsolvable
Solvable sounds like:
salable, saleable, scalpel, schlafly, shelbyville, skillful, skillfully, sleepily, sloppily, soluble, soulful, syllable