palp vs tentacle

palp

verb
  • To feel, to explore by touch. 

adj
  • Palpatory; obtained by palpation. 

noun
  • A fleshy part of a fingertip. 

  • Synonym of pedipalp. 

tentacle

verb
  • to move like a tentacle 

noun
  • One of the glandular hairs on the leaves of certain insectivorous plants. 

  • An officer employed to drive out to troops and transmit back requests for support via a special radio link. 

  • An elongated, boneless, flexible organ or limb of some animals, such as the octopus and squid. 

  • An insidious reach or influence. 

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