i Register
In some senses, alphabetical is marked as obsolete. Watch for register when choosing this word.
ADJ.
basic, last, listed
The names in the directory are arranged in alphabetical order, with the basic entries listed first.
VERB + ALPHABETICAL
appears, books, files, kept, list, names, part, placed
The library keeps all its files in alphabetical order by author's last name.
ALPHABETICAL + NOUN
language, mafia
The files were organized in alphabetical order by language to help researchers find documents more easily.
PREP.
in, into
The teacher asked us to arrange all the library books in alphabetical order by author.