loathly vs plug-ugly

loathly

adj
  • Loathsome; hideous. 

adv
  • Unwillingly; reluctantly. 

  • In a loathsome manner; disgustingly. 

plug-ugly

adj
  • Very ugly. 

noun
  • An ugly person. 

  • A member of an American nativist street gang that operated in the west side of Baltimore, Maryland, from 1854 to 1865. 

How often have the words loathly and plug-ugly occurred in a corpus of books? (source: Google Ngram Viewer )