Level 1

Cure - Restore HP

Libra/Scan - See an enemies stats and weak point

Pure/Antdt - Cure Poison status

Level 2

Quiet/Mute - Prevent an enemy from casting spells.  Doesn't always work

Safe/Armor - Raise an ally's defense power

Mini/Size - Make an enemy small, or change an ally's Mini status

Level 3

Cure2 - Restore HP

Raise/Life - Restores a wounded ally with some HP

Charm - Confuse an enemy.  Doesn't always work

Level 4

Blink/Image - Make an ally harder to hit

Shell - Raise an ally's magic defense

Esna/Heal - Cures all of an ally's status ailments.

Level 5

Cure3 - Restore HP

Wall - Reflect all spells (friendly or no, so be careful) cast at that character

Bersk - Berserks an ally.  Will not take commands but will fight till all enemies are dead with improved damage and speed.

Level 6

Arise/Life2 - Restore an ally from wounded status will full HP

Holy - Blast an enemy with White magic.  Only purely offensive White spell.

Displ - Dispels all enchantments on the target ally or monster