Synonyms of retrogression

2 Syllables
flipflop, retreat, toryism, throwback
3 Syllables
recession, relapse, reverse, regressions, relapsing, regression, relapsed, retroaction
4 Syllables
retroversion, devolution, obscurantism, recidivism, counterpole
5 Syllables
retrogradations, deterioration, degringolade, retrogradation
6 Syllables
counterrevolution