We don't have synonyms for acre foot yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are acre-foot, ice foot and acre feet.
(n) :
(US, engineering, agriculture) A unit of measure, used for volumes of water, equal to one acre times one foot (that is, to the amount of water required to cover one acre of land to a depth of one foot), which is 43,560 cubic feet, 325,851 gallons, 1,233 cubic meters.
(n) :
(US, engineering, agriculture) A unit of measure, used for volumes of water, equal to one acre times one foot (that is, to the amount of water required to cover one acre of land to a depth of one foot), which is 43,560 cubic feet, 325,851 gallons, 1,233 cubic meters.