R

Reducio
re-DOO-see-o
Reverses the effect of Engorgio, returning the subject to its normal size. It can also shrink a subject in size.

Reductor Curse
Reducto
re-DUHK-to
Blasts the subject/s out of the caster's path, or simply destroys it.

Relashio
re-LAH-shee-o
Shoots a jet of fiery sparks from the end of the caster's wand. Underwater, it shoots a jet of boiling water.

Rennervate
REN-ur-vat
Just like Ennervate; revives someone who has been hit by a Stunner.

Reparo
re-PAR-o
Repares the subject.

Restoring Spell
Causes an Animagus (in his/her Animagus form) to, with a bright blue-white flash of light, resume his or her normal form.

Rictusempra
rihk-too-SEM-pruh
Tickling Charm
Tickles the subject to the point of laughing uncontollably.

Riddikulus
rih-dih-KYOO-lus
Boggart Banishing Spell
A simple charm requiring force of mind, this spell requires the caster to visualize his or her worst fear in an amusing form while reciting the incantation. When performed correclty, this forces the boggart to take on an appearance which will inspire the laughter that forms an effective defense against the creature.