We have several large reference topics, including one called
Glossary. A large, pretty alphabetic marker (#, A, B, etc.) appears
as a type of section head (with a horizontal rule above it for
further demarcation), and this marker is bookmarked. Directly under
that is placed the links to the bookmarks for each of the letters
except that one (the links under "A" are "# B C D," etc.), We
separate each with two spaces for better legibility.
As to a search field bringing you to the typed word: No,
sorry.
Good luck,
Leon