Stove

OH:

trove, drove, dove, strove, stove, jove, shrove

prove, move, remove, 

clove, cove, alcove,

hove, wove, rove,

schwa:

glove, oven, dove (pigeon), above, shove

Why there is discrepancy?

love, grove, move: three different vowels due to ambiguity in the spelling system

Norman spelling system prohibited writing u before m, n, v: son, love, come


cf. Wiki