Expecto Patronum
Digitalis is not a spell in Harry Potter.
Harry Potter's favorite spell was Expelliarmus (disarming spell) but he also used Stupefy (stunning spell) a lot.
Stupefy.
Mobiliarabus
Accio
Expelliarmus.
Petrificus totalis
In the fourth book, Harry used the spell, Diffindo, to rip Cedric Diggory.
The spell that Harry Potter used to cause Draco Malfoy to bleed continuously in the bathroom duel scene of "Harry Potter and the Half-Blood Prince" is called "sectumsempra".
The spell Expecto Patronum is used for calling your Patronus in Harry Potter.
Lomus or something like that
Fera veto is not a known or mentioned spell in the Harry Potter series.If you meant vera verto, this spell is used for transfiguring animals into water goblets. Professor McGonagall demonstrates this spell in Harry's second year transfiguration class.