General synonyms:
* Intrude: This implies entering into someone else's space or territory without permission.
* Trespass: This specifically refers to entering someone's property without permission.
* Infringe: This suggests violating someone's rights or boundaries.
* Overreach: This implies exceeding one's authority or limits.
* Invade: This suggests a forceful entry into someone's space or territory.
* Usurp: This implies taking over someone's position or authority.
* Seize: This implies taking control of something by force.
More specific synonyms:
* Creep: This suggests a gradual and stealthy encroachment.
* Graze: This suggests a slight or marginal encroachment.
* Spread: This suggests that something is expanding and encroaching on other areas.
* Expand: This suggests that something is growing and encroaching on other areas.
The best synonym will depend on the specific context in which you are using the word "encroach."