Accio: Summons
an object

Aguamenti: Shoots
water from wand.

Alohomora: Opens
locked objects

Anapneo: Clears
the target's airway.

Aparecium: Reveals
invisible ink

Avada
Kedavra: Murders opponent (Unforgivable)

Avifors: Turns small
objects into birds

Avis: Launches
birds from your wand

Cave
Inimicum: Strengthen an enclosure from enemies

Colloportus: Magically
locks door

Colloshoo: Causes
your opponents shoes to stick to the floor

Confringo: Explode
Flames on target

Confundus: Used to
confuse opponent

Conjunctivitis: Damages
opponents eyesight

Crucio: Tortures
opponent (Unforgivable)

Defodio: Dig out
materials

Deletrius: Counters
"Prior Incantato"

Densaugeo: Enlarges
Teeth

Deprimo: Wind
Damaging Spell

Diffindo: Splits
seams

Dissendium: Opens
"One eyed witch" hump

Duro: Makes
Objects Hard

Engorgio: Enlarges
and item

Ennervate: Counters
Stupefy

Episkey: Heals
minor injuries

Erecto: Erects
things

Expecto
Patronum: Creates a Patronus

Expelliarmus: Disarms
your opponent

Expulso: Makes Objects
Explode

Ferula: Creates
bandages

Fidelius: Hides a
secret within someone

Finite
Incantatum: Stops any current spells

Flagrate: Allows
user to write on objects

Flipendo: Knocks an
object backwards

Fumos: Puts up a
defensive smokescreen

Furnunculus: Produces
boils on opponent

Geminio: Duplicates
an Object

Glisseo: Turns
stairs into ramps

Homenum
Revelio: Reveals humans nearby

Homorphus: Lockhart's
Werewolf "cure"

Immobulus: Renders
target immobile.

Impedimenta: Slows an
advancing object

Imperio: Controls
a person (Unforgivable)

Impervius: Makes an
object repel water

Incarcerous: Ties
someone up

Incendio: Starts a
fire

Langlock: Glues
opponent's tongue to roof of mouth

Legilimens: Allows
the caster to delve into the mind of the victim

Levicorpus: Hangs
victim upside down by feet

Liberacorpus: Counterspell

Locomotor
Mortis: Locks opponents legs

Locomotor
Wibbly: Causes your opponents legs to collapse

Lumos: Creates
light at wand tip

Meteolojinx
Recanto: Causes weather effect spells to stop

Mimble
Wimble: Ties opponents tongue in knot

Mobiliarbus: Moves
objects with wand

Mobilicorpus: Moves
unconscious bodies

Morsmorde: Conjures
the Dark Mark

Mucus ad
Nauseam: Causes opponent to have really runny nose

Muffliato: Prevents
nearby people from listening to conversations

Nox: Counter
to Lumos

Obliviate: Erases
memories

Obscuro:
Blindfolds the victim

Oppugno: Makes
conjured items attack

Orchideous: Conjures
a bunch of flowers

Pack: Packs a
trunk (suitcase)

Peskipiksi
Pesternomi: Removes Pixies (maybe)

Petrificus
Totalus: Body - Bind

Piertotum
Locomotor: Animates statues and armor suits

Point Me: Wand acts
like a compass

Priori
Incantatum: Result when brother wands duel

Prior
Incantato: Reveals a wands last spell / cast

Protego: Cause
spells to reflect back to the sender.

Protego
Horribilis: Protects one from Dark Magic

Protego
Totalum: Area Protection Spell

Quietus: Counter
spell for Sonorus

Reducio: Returns
items to original size. Counters Engorgio

Reducto: Blasts
solid objects aside

Relashio: Releases
user from binding

Rennervate: Cures
unconsciousness

Reparo: Repairs
Things

Repello
Muggletum: Keeps Muggles away

Rictusempra: Tickles
opponent

Riddikulus: Use this
spell and laugh to defeat a boggart

Salvio
Hexia: Protection against hexes

Scruge: Destroys ectoplasm
(remains of ghosts)

Sectumsempra: Causes
wounds as if slashed by a sword

Serpensortia: Produces
Snake

Silencio: Silences
victim

Sonorus: Amplifies
voice

Specialis
Revelio: Reveals Hidden secrets or magical properties

Stupefy: Knocks
out opponent

Tarantallegra: Forces
opponent to dance

Tergeo: Cleans up
messes

Titillando: Tickles
and weakens opponent

Waddiwasi: Unsticks
an object

Wingardium
Leviosa: Makes on object fly