loud vs operant

loud

adj
  • Of great intensity. 

  • High-quality; premium; (by extension) having a strong or pungent odour indicating good quality. 

  • Having unpleasantly and tastelessly contrasting colours or patterns; gaudy. 

  • Not subtle or reserved, brash. 

  • Noisy. 

noun
  • High-quality marijuana. 

  • A loud sound or part of a sound. 

adv
  • Loudly. 

operant

adj
  • That operates to produce an effect. 

noun
  • Any of a class of behaviors that produce consequences by operating (i.e., acting) upon the environment. 

  • An operative person or thing. 

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