General weight:
* Weight: This is the most general term for heaviness.
* Load: This implies something being carried or transported.
* Burden: This implies something heavy and difficult to bear.
Specific types of heaviness:
* Mass: Used for large amounts of matter.
* Density: Refers to how closely packed matter is.
* Gravity: This is a force that pulls objects toward each other.
Figurative meanings:
* Oppression: This refers to a feeling of being weighed down or burdened.
* Responsibility: This can feel like a heavy weight.
Other possibilities:
* Bulk: This refers to the size and weight of something.
* Cumber: This means something heavy or difficult to move.
To choose the best word, consider what you want to emphasize. For example, if you are talking about the weight of a physical object, "weight" or "load" might be best. If you are talking about the emotional weight of a situation, "burden" or "oppression" might be more appropriate.