Crossword clues for the word: STI The word STI has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for STI Showing 1 to 5 of 5 results Clue(s) "Hepatitis B, e.g." "HPV, e.g." "HPV, for one" "Prop up, or bite down" Bed bug?: Abbr.