conventional (adj.)

• accepted
• accordant
• accustomed
• acknowledged
• agreed
• anal
• approved
• authentic
• authoritative
• average
• bourgeois
• button-down
• canonical
• ceremonial
• ceremonious
• common
• commonplace
• compulsive
• concordant
• conformable
• conformist
• conscientious
• conservative
• constrained
• contractual
• correct
• corresponding
• current
• customary
• decent
• decorous
• established
• evangelical
• everyday
• faithful
• familiar
• fastidious
• firm
• fixed
• formal
• formalistic
• garden
• habitual
• hallowed
• harmonious
• heroic
• hieratic
• hoary
• immemorial
• inveterate
• kosher
• legendary
• literal
• long-standing
• meet
• middle-class
• moderate
• mythological
• naive
• natural
• nice
• normal
• normative
• old-fashioned
• oral
• ordinary
• orthodox
• pedantic
• plastic
• pompous
• popular
• precise
• prescribed
• prescriptive
• prevailing
• prevalent
• proper
• punctilious
• reactionary
• received
• recognized
• regular
• regulation
• reliable
• responsible
• right
• ritual
• ritualistic
• rooted
• run-of-the-mill
• sacerdotal
• scriptural
• scrupulous
• seemly
• set
• simple
• sober
• solemn
• sound
• square
• standard
• stately
• stock
• stodgy
• straight
• stuffy
• suburban
• temperate
• textual
• time-honored
• traditional
• traditionalist
• traditionalistic
• true
• true-blue
• understood
• unexceptional
• universal
• unremarkable
• unsophisticated
• unspectacular
• unwritten
• uptight
• usual
• venerable
• vernacular
• well-mannered
• widespread
• wonted
• worshipful