regular

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