diffusive vs spiral

diffusive

adj
  • That diffuses something; disseminating. 

  • That is spread or dispersed across a wide area or among a large number of people. 

  • Involving or employing many words; expansive, discursive; (in negative sense) long-winded. 

  • Pertaining to diffusion. 

spiral

adj
  • Helical, like a spiral. 

verb
  • To increase continually. 

  • To cause something to spiral. 

  • To move along the path of a spiral or helix. 

noun
  • A helix. 

  • A section of track that forms a circle and crosses over itself, used for gaining height in mountainous territory. 

  • A self-sustaining process with a lot of momentum involved, so it is difficult to accelerate or stop it at once. 

  • A curve that is the locus of a point that rotates about a fixed point while continuously increasing its distance from that point. 

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