There are other words which sound like money: honey, monkey, Monday.
Theory:
Everyone knows how the vowel O sounds, right?
O as in DOG.
But what about O as in SOME?
Or O as in NO.
Or O as in Lose.
Or O as in sailOr.
The vowel O has at least 5 different sounds, and that is why spoken English can be complicated to understand, and speak.
It is impossible to look at the letters of any word and predict how the word should sound.
The only way to pronounce a word correctly is to learn the sound of each word individually.
So let's start wit the letter O.
There are many words where the O sounds like the U in cUp, and here are some of them:
SOME
COME
MONEY
HONEY
MONDAY
MOTHER
BROTHER
MONKEY
OTHER
COMFORTABLE
WONDERFUL
GOVERNMENT
Another very common sound for O is like the O in nO. This sound needs a bit of practice: the sound starts at O as in DOG, and changes to U as in YOU, O > U.
Common words with this sound are:
NO
GO
COLD
PHONE
GOLD
HOLD
TOLD
In fact any word which finishes with the silent E, as in nosE, will have this O sound.
The normal sound for O as in dOg is also very common:
GOT
DOG
HOT
KNOT
POT
This is the sound when the word doesn't finish with the silent E.
There are some words, not many, where the O sounds like the O in lOse:
LOSER
WHO
WHOSE
TWO
THROUGH
Then, in words where the O is not part of the dominant syllable, the O sounds like the aah of Schwa, as in sailOr:
ACTOR
MAJOR
MOTOR
Often the same word may have two O's, and both sound differently, as in MOTOR.