1. Acceptable for a long time
   "time-honoured customs"
   - time-honored [US] 
2. Honoured because of age or long usage
   "time-honoured institutions"
   - time-honored [US]

See also: honorable [US], honourable [Brit, Cdn], reputable

• cometh
• cometic
• comeupance
• comeuppance
• comfit
• comfort
• comfort food
• comfort station
• comfort woman
• comfort zone
• comfortable
• comfortableness
• comfortably
• comforted
• comforter
• comforting
• comfortingly
• comfortless
• comforts
• comfrey
• comfy
• comic
• comic book
• comic opera
• comic relief