TETHER is most similar in meaning to?

"Tether" has a few different meanings, so the most similar word depends on the context. Here are a few possibilities:

If you mean "to tie or fasten something":

* Attach

* Bind

* Secure

* Connect

* Fasten

If you mean "a rope or chain used to tie something":

* Leash

* Cord

* Line

* Chain

If you mean "a limit or restraint":

* Constraint

* Restriction

* Limit

* Bound

If you mean "a connection or link":

* Bond

* Tie

* Link

* Connection

Please provide more context about how you are using the word "tether" so I can give you a more precise answer.