broadside vs undertow

broadside

verb
  • To collide with something side-on. 

adv
  • Sideways; with the side turned to the direction of some object. 

noun
  • The printed lyrics of a folk song or ballad; a broadsheet. 

  • A forceful attack, be it written or spoken. 

  • One side of a ship above the water line; all the guns on one side of a warship; their simultaneous firing. 

  • A large sheet of paper, printed on one side and folded. 

undertow

verb
  • To pull down by, or as by, an undertow. 

  • To flow or behave as an undertow. 

  • To pull or tow under; drag beneath; pull down. 

noun
  • A short-range flow of water returning seaward from the waves breaking on the shore. 

  • A feeling that runs contrary to one's normal one. 

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