By gum or bygum which means Wow.
Blast!
vow
EGAD
Oath of fealty is a middle ages term. It begins with the letter O.
Oafs, oaks, oars, oath, oats, obey, obis, oboe, odds, odor, ogle, oily, oink, okay, okra, oleo, omen, omit, once, only, onto, onus, onyx, ooze, open, oral, orgy, ouch, ours, oust, outs, oval, oven, over, owed, owls, owns and oxen are 4 letter words. They begin with the letter o.
· oafs · oaks · oars · oath · oats · obey · obis · oboe · odds · odor · ogle · oily · oink · okay · okra · oleo · omen · omit · once · only · onto · onus · onyx · ooze · open · oral · orgy · ouch · ours · oust · outs · oval · oven · over · owed · owls · owns · oxen
drat, darn
Four letter mild oath starting with h= heck
vow
Dang?
Heck.
drat, egad
drat
A mild oath that starts with "e" is usually "egad." Perhaps the "m" is incorrect.
heck
drat
drat
drat