Synonyms for Oaf:

n.

misogynist, rogue, villain, son of a gun, prodigal, pup, cad, boor. lug, hulk, meathead, meatball, ox, ability. blockhead (noun)
fool, moron.
bungler (noun)
bungler, bonehead, goof, clod, blockhead, butter-fingers, clown, yokel, clodhopper, bumbler, dolt, blunder-head, botcher, fumbler.
fool (noun)
fool.
klutz (noun)
klutz.
lout (noun)
lout.
lummox (noun)
clodhopper.
oaf (noun)
lout, lummox, gawk, goon, klutz, clod, lump, lubber, stumblebum.
person who is clumsy, stupid (noun)
goon, lout, clown, dolt, fool, clod, moron, klutz, ox.
stupid person (noun)
clod.

Other synonyms:

meatball, meathead, fool. lug, ox. hulk. lout
boor, lout.
Other relevant words:
klutz, lubber, moron, lummox, gawk, goon, lump, fool, meatball, boor, meathead, ox, stumblebum, lout, hulk, lug.