What was the word on episode number 673? 
CREATE TABLE "table1_25691838_2" (
  "episode_num" real,
  "the_w_rd" text,
  "guest" text,
  "introductory_phrase" text,
  "original_airdate" text,
  "production_code" real
);
SELECT "the_w_rd" FROM "table1_25691838_2" WHERE "episode_num"=673;