Noldorin 

heria-

verb. to begin suddenly and vigorously

The forms heno, hœno in the Etymologies are misreadings according to VT/45:22

Noldorin [Ety/364, VT/45:22] Group: SINDICT. Published by

heria-

verb. to begin suddenly and vigorously

Noldorin [Ety/KHOR; EtyAC/KHOR] Group: Eldamo. Published by