regular

accepted accustomed accurate amicable average blank businesslike certain changeless characteristic commonest common conformable constant continual continuous conventional correct customary cyclical daily dull dull duller duller equable even faithfully formal frequenter general good gradational gradual habitual habitué horizontal innate instinctual instinctive intimate invariable invariant isochronous isochronal judicial just legitimate level mainstream measured methodic methodical methodical/methodic monochromatic more accurate more certain more correct more constant more even more formal more methodic more methodic more methodical more methodical more normal more natural more orderly more prevalent more readable more solid more uniform most certain most correct most methodic most methodic most methodical most methodical most punctual natural neat neater neatest normal old-school old school orderly pandemic paradigmatic periodic planar plane prevailing prevalent prototypal prototypic prototypical punctual readable recurrent round-the-clock routine run-of-the-mill sequential set shapely sincere sincerest smooth smoothest smoother sociable solid standing stated steady-going steady steady step-by-step stocker stock stuporous symmetric symmetrical systematical systematic through time-honored traditional trig truest truer true typic typical unbroken uniform universal unremitting unwavering usual veridical virtuous wonted