悪例[akurei] bad example
異例[irei] exception
違例[irei] unconventionality
一例[ichirei] example
引例[inrei] quotation

佳例[karei] good example
嘉例[karei] happy precedent
家例[karei] family custom
勘例[kanrei] considering old precedents
慣例[kanrei] custom

悪習慣[akushuukan] bad habit
慣らす[narasu] to accustom
慣れ[nare] practice
慣れる[nareru] to grow accustomed (to)
慣行[kankou] customary practice

慣行取引き[kankoutorihiki] usual business practices (practises)
慣習[kanshuu] usual (historical) custom
慣性[kansei] inertia
慣用[kanyou] common
慣用句[kanyouku] idiomatic usage