Countdowns rhymes with:
putdowns, shutdowns, writedowns, breakdowns, closedowns, crackdowns, drawdowns, markdowns, putdowns, shakedowns, showdowns, shutdowns, slowdowns, southdown's, touchdowns, writedowns
Countdowns sounds like:
camden's, canadian's, canadians, canadians', canteens, cantonese, cantons, cementing, centimes, chanting, chintung, comedian's, comedians, commanding, commending, commenting, committing, commuting, condemning, condemns, condense, conditioning, conditions, condominiums, condoms, condones, condoning, connotations, containing, contains, continuance, continuances, continues, continuing, continuous, countenance, countenances, counting