General synonyms:
* Obscuring: This is a good general synonym, meaning to hide or make something unclear.
* Concealing: Similar to obscuring, but with a stronger implication of intentionality.
* Erasing: This implies a complete removal of something.
* Deleting: Similar to erasing, but often used for digital information.
* Suppressing: This suggests a deliberate effort to prevent something from being seen or known.
* Drowning out: This implies that something is being overpowered by another sound or sensation.
More specific synonyms:
* Extinguishing: This can be used when talking about light or fire.
* Covering: This can be used when talking about physically covering something up.
* Blacking out: This suggests a complete loss of visibility or consciousness.
* Censoring: This implies the removal of something considered offensive or unsuitable.
The best synonym will depend on the specific context in which you're using it.