Winona–as in Ms. Ryder.
Or viola, for those of you who don’t like using proper nouns in this game.
ioe
IOE = Riposte
IOI = Tinfoil (only because it was just mentioned)
IOO = ?
IOO - Igloo
IOU
IOU - pinout
IUA - ?
IUA = visual
IUE (right?)
IUE - immune
IUI
IUI - intuit
IUO - ?
liquor
Since iii got skipped, dividing.
IUU?
Interestingly enough…
IUO: simulpost
IUU?
Whoops, missed your post while I was pondering IUO, Sternvogel.
IUU: vinculum
OAA?
Shoshana, Osama, O’hara, Osaka.
Bonanza.
OAE
OAE: prostrate
OAI?
OAI = Bombastic
OAO =
OAO – potato (unless you’re Dan Quayle) 
OAU?
onslaught
OEA
Ocean
OEE
OEE - Opened
OEI - ?
Prosthetic.
OEO?
forefront
OEU