What is the most common adjective used to describe objects that can be tied. I would think of tieable but it does not seem to exist in the wiktionary.
I would say "The score was tied." "The (noun) can be tied." "A tie (noun) is possible." The rules for spelling are not much help, but if the silent "e" were dropped, "tiable" results. I have seen "tying", but never "tiable". I have seen "tie-able", but it is an incorrect and meaningless use of the hyphen. So, use the long form.
the word anchorable springs to mind