alternate Synonyms

seesaw switch flip surrogate understudy replacement jump take turns interchange tack alternating substitute alternative tergiversate temporary undulate transpose teeter wabble understrapper vicariously undulant vicarial undulatory vacillate vary variant tacking synonym subrogate substituent stand-by substituting substitution substitutive substract successive superseding supersede supersession supplanter surrogation swap swing switching swop sub wavelike fallback every other