"Smelled to high heaven" is a popular idiom used to describe a strong, unpleasant odor. However, there are several other words and phrases that can be used to convey the same meaning. For instance, "stunk to high heavens" is a common variation of the expression. Other synonyms for "smelled to high heaven" include reeked, stank, smelled bad, had a foul odor, stunk to high heaven, and emitted an unpleasant smell. When writing or speaking, it is essential to select words carefully to convey the intended message effectively. Using these synonyms could help add specificity and variety to your language.