What is another word for "crumble"?

Roget's Thesaurus (1911) lists these synonyms for "crumble": abate, abatement, abridge, abridgment, analysis, analytical, analyze, and, anticlimax, attenuate, away, bate, break, catalysis, catalytic, coarctation, contract, contraction, corruption, decay, decentralize, declension, decline, decompose, decomposed, decomposition, decompound, decrease, decreasing, decrement, depreciate, depreciation, dequantitate, descend, descent, deterioration, die, diminish, diminution, discount.