| periodic(adjective, regular) |
| prone(apt, likely, inclined) |
| recognized(adjective, usual, normal, impulse, conventional) |
| recurrent(adjective, regular) |
| regulation(usual, normal, accepted, traditional, habitual) |
| steady(adjective, regular) |
| time-honored(adjective, usual, regular, conventional, customary) |
| time-honoured |
| unremarkable(adjective, plain, common, ordinary, natural) |
| vernacular |
| acclimatised |
| accomplished(familiar, sophisticated, knowledgeable, skilled, competent) |
| acknowledged(adjective, common, ordinary, familiar, usual) |
| acquainted(verb, adjective, familiar, disciplined, conversant) |
| addicting |
| adept(familiar, sophisticated, knowledgeable, skilled, competent) |
| afoot(present, modern, general, prevailing, existing) |
| apathetic(adjective, dull, quiet, hard, flat) |
| authorized(adjective, conventional, customary, established) |
| been around(expression, familiar, sophisticated, knowledgeable, competent) |