regular

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