shipworm: wormlike marine bivalve that bores into wooden piers and ships by means of drill-like shells
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
correlation table: a two-way tabulation of the relations between correlates; row headings are the scores on one variable and column headings are the scores on the second variables and a cell shows how many times the score on that row was associated with the score in that column