Dinnertime rhymes with:
overtime, summertime, wintertime, airtime, alltime, anytime, bedtime, centime, christmastime, daytime, downtime, everytime, flextime, fulltime, funtime, halftime, lifetime, longtime, lunchtime, maritime, mealtime, meantime, movietime, nighttime, noontime, overtime, parttime, pastime, peacetime, primetime, quicktime, ragtime, schooltime, showtime, sometime, springtime, summertime, wartime, wintertime
Dinnertime sounds like:
demartin, demartini, demartino, dimartino