boo, moo, echo, veto, solo, go, do, coo
dynamo, duo
One example of a three-letter word that starts with "a" and ends with "o" is "ago."
A Zoo.
Five letter words that start and end with letter O are outdo and outgo.
Some four letter words that start and end with O are:oleoOreoorzo
"OXBOW"
No 5 letter word in the English language starts with the letter O and ends with the letter Z.
Elmo
Machismo or mosquito.
ode owe once ogre
Obedient, obstruct, occupant, offshoot, ointment, ornament, optimist and opponent are 8 letter words. They begin with the letter o and end with the letter t.
The only words I see are Of and Loof.