HOORAH is validvalid

to hurrah [v HOORAHED, HOORAHING, HOORAHS]

21,710 of 196,601 in NWL2023·also valid in CSW24

(obsolete) an exclamation of approbation or joy [n -S] / to shout hooray, also HOORAY, HURRA, HURRAH, HURRAY [v -ED, -ING, -S]