Cure - Restore HP
Libra/Scan - See an enemies stats and weak point
Pure/Antdt - Cure Poison status
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
Cure2 - Restore HP
Raise/Life - Restores a wounded ally with some HP
Charm - Confuse an enemy. Doesn't always work
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.
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.
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