Crossword clues for the word: THERA The word THERA has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for THERA Showing 1 to 6 of 6 results Clue(s) ___Flu: cold/flu product "Heyerdahl's ""___ Expeditions""" An Aegean island Island of the Cyclades. Volcanic island in the Aegean Volcanic isle in the Cyclades.