Odor:
* Neutral or negative: Often used to describe smells that are unpleasant, pungent, or even offensive.
* Stronger, more intense: Can be used for both pleasant and unpleasant smells, but usually implies a stronger scent.
* Less specific: Can refer to a wide range of smells, both good and bad.
Aroma:
* Positive or pleasant: Usually refers to smells that are agreeable, inviting, or even delicious.
* Subtle, evocative: Often used to describe smells that are delicate and evoke specific memories or emotions.
* More specific: Often associated with specific things, like the aroma of coffee, spices, or flowers.
Examples:
* Odor: "The odor of rotting garbage filled the alleyway."
* Aroma: "The aroma of fresh bread filled the kitchen."
In summary:
* Odor is a broader term that can be used for any smell, but often carries a negative connotation.
* Aroma usually refers to pleasant, evocative smells.
It's important to note that the distinction between "odor" and "aroma" is subjective and can vary depending on the context and individual preferences.