Answer: thera

AnswerCrossword Clue
THERA..Flu: cold-flu product
THERAIsland of the Cyclades.
THERAVolcanic isle in the Cyclades.
THERAGreek island
THERAAn Aegean island
THERAVolcanic island in the Aegean
THERAHeyerdahl's ".... Expeditions"
THERAHeyerdahl's "... Expeditions"