ratty vs sibilant

ratty

noun
  • Synonym of knock down ginger (“prank of knocking on a front door and running away”) 

adj
  • In poor condition or repair. 

  • Annoyed, bad-tempered, irritable. 

  • Resembling or characteristic of a rat; ratlike. 

  • Infested with rats. 

  • Crazy, mad; ridiculous; slightly strange, eccentric; also (followed by about, on, or over), attracted to, infatuated with. 

sibilant

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

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

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