Repression rhymes with:
compression, decompression, depression, expression, impression, misimpression, oppression, suppression, aggression, compression, decompression, depression, digression, discretion, expression, freshen, impression, indiscretion, misimpression, nonaggression, oppression, progression, regression, suppression, transgression
Repression sounds like:
repercussion, reversion, robberson, roberson