Menstruation rhymes with:
continuation, devaluation, discontinuation, evaluation, fluctuation, graduation, infatuation, insinuation, overvaluation, punctuation, reevaluation, revaluation, self-perpetuation, situation, undervaluation, valuation
continuation, devaluation, discontinuation, evaluation, fluctuation, graduation, infatuation, insinuation, overvaluation, punctuation, reevaluation, revaluation, self-perpetuation, situation, undervaluation, valuation