loofah vs soap

loofah

verb
  • To clean or scrub with a loofah. 

noun
  • Any bathing sponge 

  • A tropical vine, of the genus Luffa, having almost cylindrical fruit with a spongy, fibrous interior; the dishcloth gourd 

  • The dried fibrous interior used as a sponge for bathing 

soap

verb
  • To apply soap to in washing. 

  • To cover, lather or in any other form treat with soap, often as a prank. 

  • To be discreet about (a topic). 

noun
  • sodium pentothal 

  • A soap opera. 

  • Some other substance, often a detergent or another surfactant, able to mix with both oil and water, used for cleaning. 

  • A solid masonry unit or brick reduced in depth or height from standard dimensions. 

  • A metallic salt derived from a fatty acid, commonly used in cleaning products. 

  • Money, specially when used as a bribe. 

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