Funtime rhymes with:
centime, downtime, meantime, noontime, airtime, alltime, anytime, bedtime, centime, christmastime, daytime, dinnertime, downtime, everytime, flextime, fulltime, halftime, lifetime, longtime, lunchtime, maritime, mealtime, meantime, movietime, nighttime, noontime, overtime, parttime, pastime, peacetime, primetime, quicktime, ragtime, schooltime, showtime, sometime, springtime, summertime, wartime, wintertime
Funtime sounds like:
fantini, fanton, fenton, finton, fontaine, fontana, foundation, fountain, fountaine