The closest rhymes for "untold" would be unfold and unsold. However, anything that rhymed with "old" would be acceptable, such as behold, bold, cold, gold, strolled, rolled, fold, hold, behold, foretold and controlled, to name a few.
Gold.
untold
Untold was created in 2003.
The Untold Story was created in 1993.
The Untold was created in 2002-05.
The novel was untold.
There are untold amounts of Nazi gold and stolen Jewish heirlooms hidden somewhere in the Vatican City.How on Earth can a story exist if it was untold?
Untold Stories was created in 1988.
The Untold Truth was created in 1992.
Untold Passion was created in 1981.
Untold Scandal was created in 2003.
Treasures Untold was created in 1964.