Crossword solverSynonyms for underground11 crossword answers for “underground” (11), sorted by letter count.How many letters?All115163811011121211311415 letters 1metro6 letters 3secretcovertmaquis8 letters 1hush-hush(4-4)10 letters 1resistance11 letters 2clandestinebelowground12 letters 1hugger-mugger(6-6)13 letters 1hole-and-corner(4-3-6)14 letters 1cloak-and-dagger(5-3-6)