@MonicaCellio The basic issue is that there's no such formal thing as tag hierarchy (or stemming), where you could, for example, tag something with
schach, and it would automatically also come up in searches for
sukkah and
sukkot. In its absence, I'd be in favor of tagging schach questions with
schach and any other relevant tags, and if there's space in the five left over, add
sukkah and then
sukkot.