labium vs overlap

labium

noun
  • A liplike structure; especially one of the two pairs of folds of skin on either side of the vulva. 

  • The lip of a labiate corolla. 

  • A liplike part of various invertebrates. 

  • The lip against which pressured air is driven to produce sound in a recorder and in a pipe organ with flue pipes. 

  • A lower mouthpart of an insect that is formed by the second pair of maxillae united in the middle line. 

overlap

noun
  • Something that overlaps or is overlapped 

  • a situation in the game where an attacking line has more players in it than the defensive line coming to meet it. The attacking side may exploit the overlap by using their superior numbers to break the opposition's defensive line. If attackers outnumber defenders by more than one player this is often termed a two man overlap or three man overlap, etc. If the attacking side fails to break through usually due to poor execution, they are said to waste an overlap. 

  • The payment of a spouse's or other dependant's annuity benefits concurrently with the member's benefits, on death of the member during the guarantee period. 

verb
  • Of sets: to have some elements in common. 

  • To have an area, range, character or function in common. 

  • To have some similar nucleotide sequences. 

  • To extend over and partly cover something. 

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