bulbous vs gibbous

bulbous

adj
  • Having the shape of or resembling a bulb, bloated. 

  • Growing from a bulb or producing bulbs. 

  • Overweight and round in shape. 

gibbous

adj
  • Having more than half (but not the whole) of its disc illuminated. 

  • Characterized by convexity; protuberant. 

  • Humpbacked. 

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