sibilant vs sonorous

sibilant

adj
  • Characterized by a hissing or hushing sound such as the s or sh in sack or shack. 

noun
  • A consonant having a hissing or hushing sound such as the s or sh in sack or shack. 

sonorous

adj
  • Capable of giving out a deep, resonant sound. 

  • Full of sound and rich, as in language or verse. 

  • Wordy or grandiloquent. 

  • Produced with a relatively open vocal tract and relatively little obstruction of airflow. 

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