A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Try this, adjusting the ranges as needed:
=INDEX($A$1:$H$1,SUMPRODUCT(($A$2:$H$8=K1)*COLUMN($A$1:$H$1)))
where A1:H8 is the array, and K1 is the cell containing the word you're looking for.