Noldorin 

ovra-

verb. to abound

A verb appearing in The Etymologies of the 1930s in its [Noldorin] infinitive form ovro “to abound” based on the root ᴹ√UB “abound” (Ety/UB). There is some evidence that √UB >> √UM in Tolkien’s later writings (VT48/32), but that conceivably could still produce ovra- < umrā-.