conventional vs proper

conventional

adj
  • Pertaining to a convention, as in following generally accepted principles, methods and behaviour. 

  • Ordinary, commonplace. 

  • In accordance with a bidding convention, as opposed to a natural bid. 

  • Banal, trite, hackneyed, unoriginal or clichéd. 

  • Pertaining to a weapon which is not a weapon of mass destruction. 

  • Making use of synthetic fertilizers and pesticides. 

noun
  • A conventional gilt-edged security, a kind of bond paying the holder a fixed cash payment (or coupon) every six months until maturity, at which point the holder receives the final payment and the return of the principal. 

proper

adj
  • Following the established standards of behavior or manners; correct or decorous. 

  • Suited or acceptable to the purpose or circumstances; fit, suitable. 

  • Eigen-; designating a function or value which is an eigenfunction or eigenvalue. 

  • Belonging to oneself or itself; own. 

  • Being strictly part of some other thing (not necessarily explicitly mentioned, but of definitional importance), and not being the thing itself. 

  • In the strict sense; within the strict definition or core (of a specified place, taxonomic order, idea, etc). 

  • Used to designate a particular person, place, or thing. Proper nouns are usually written with an initial capital letter. 

  • Pertaining exclusively to a specific thing or person; particular. 

  • Excellent, of high quality; such as the specific person or thing should ideally be. (Now often merged with later senses.) 

  • Attractive, elegant. 

  • In the very strictest sense of the word. 

  • Portrayed in natural or usual coloration, as opposed to conventional tinctures. 

  • Utter, complete. 

noun
  • A part of the Christian liturgy that varies according to the date. 

adv
  • properly; thoroughly; completely. 

  • properly. 

How often have the words conventional and proper occurred in a corpus of books? (source: Google Ngram Viewer )