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/methodic methodical monochromatic more constant more correct more even more accurate more certain more formal more methodic more methodic more methodical more methodical more readable more normal more solid more orderly more prevalent more natural more uniform most certain most correct most methodical most methodical most methodic most methodic most punctual natural neat neater neatest normal old school old-school orderly pandemic paradigmatic periodic plane planar prevailing prevalent prototypic prototypical prototypal punctual recurrent readable 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