aire

(surface) area; a flat surface; direction of the wind; threshing floor; area, zone, range (a space in which a certain thing occurs)

Inherited from Old French aire, eire, from Latin ārea. Doublet of are and area, which were learned borrowings.

eyrie, aerie

Probably from Latin ager, agrum (and hence a doublet of ager, a later borrowing), or related to the above. Compare Old Occitan agre (“bird's nest”).