harmful vs obstruent

harmful

adj
  • of a kind likely to be damaging; injurious 

obstruent

adj
  • Causing obstruction; blocking up. 

noun
  • A consonant sound formed by obstructing the airway, causing turbulence; a plosive, fricative, or affricate. 

  • Hypernym: consonant 

  • Anything that obstructs, especially in the passages of the body. 

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