Crossword clues for the word: USG The word USG has appeared as an answer to at least 11 crossword clues on different crossword puzzles. Crossword clues for USG Showing 1 to 11 of 11 results Clue(s) 1869-'77 pres. monogram 18th President's monogram Appomattox initials Battle of Shiloh monogram Monogram for our 18th Pres. Monogram for the 18th U.S. president Monogram of the 18th pres. Post-Civil War pres. Pres. before RBH Prez between AJ and RBH The Feds: abbr.