Terms for mages

[Raelifin]

[spoiler=Alphabetized List] Alchemist
Arcanist
Arcane engineer
Binder
Cabalist
Channeler
Conjurer
Demonologist
Diviner
Elementalist
Enchanter
Evoker
Gifted
Illusionist
Invoker
Kuanta miner
Leyman
Magic wielder/user
Magus/magi
Mentalist
Mindshaper
Necromancer
Runesmith
Seer
Sensitive
Shaman
Summoner
Sympathists
Thaumaturge
Theurge
Touched
Transmuter
Vivemancer
Voidsoul
Warlock
Warlock engineer
Witch
Witch Doctor
Wizard
Worldbender
[/spoiler]

[Seraph]

[spoiler=Alphabetized List] Alchemist
Arcanist
Arcane engineer
Binder
Cabalist
Channeler
Conjurer
Demonologist
Diviner
Elementalist
Enchanter
Evoker
Gifted
Illusionist
Invoker
Kuanta miner
Leyman
Magic wielder/user
Magus/magi
Mentalist
Mindshaper
Necromancer
Runesmith
Seer
Sensitive
Shaman
Summoner
Sympathists
Thaumaturge
Theurge
Touched
Transmuter
Vivemancer
Voidsoul
Warlock
Warlock engineer
Witch
Witch Doctor
Wizard
Worldbender
[/spoiler]

actually Arcane Engineer should come before Arcanist

[Atlantis]

i like wizard best

[SDragon]

Mesmer. Caster. One possible term for magic-- although, it wouldn't fit at all in a "magic as a science" setting-- could be Unreality, and a name for mages could be built off that somehow.

[Matt Larkin (author)]

Mantis (diviner) would be more correct than mancer.

Also (unrelated) Mantric (Indian).

Vala/Wala/Wicce (Norse; female only)
spámaðr (Norse male)

[XXsiriusXX]

Since you are leaning towards the "magic as a science" approach, my suggestion would be that whatever titles you do end up using could represent academic degrees. For example a magic user with and associates level degree would be called an adept, a bachelors would be a wizard, a masters would be called a mage, and lastly a Ph.D. would be called an arcanist.  

[Superfluous Crow]

Actually, they manipulate the scientific laws by altering the "reality state" of objects and areas, so Unreality isn't a bad word for it at all in my game.
Added a few more (oracle, scryer and some others), and adopted the alphabetical list. Thanks guys  :D
Two more things. Since -mancy means divination, wouldn't pyromancy mean divination through fire? Not that we have to care since many people just understand the word as "magic", anyway, but still.
And is there some kind of derivative of eldritch for a caster? Elder? hm, i should add that one no matter what...

[Raven Bloodmoon]

Sorcerer/ess, witch, warlock, heretic, blasphemer, devil, demon, mage, and thaumaturge come to mind.  Arcanists often find themselves on the wrong side of religion in my settings.

[Matt Larkin (author)]

Wikipedia[/url] lists several other forms of divination, as well.

[khyron1144]

I see one of my favorite AD&D 2e wizard specialties hasn't made the list yet:

Geometer


There's also a lot of ____ Wizard types, like Shadow Wizards or Song Wizards.

[khyron1144]

It may also be worth checking in on:
http://boards1.wizards.com/showthread.php?t=682417

[Xeviat]

I prefer to use wide varieties of terms. For my own setting, I am using "Mage", "Priest", and "Sorcerer" for my three casting classes, and I hope to have different terms from different cultures (shaman, druid, cleric ... all will be priests), specialties, and focuses. Within the world, the differences between the classes are easily apparent, and the myth and legend of each classes have spread enough that even the lay people have preconceived ideas about them (all priests are benevolent, all sorcerers are destructive, all magi are indifferent ... for example). Not saying that a lay person would be able to identify a sorcerer from a mage from a priest, but at least most would think they could.

[Ra-Tiel]

In the WCS there is no commonly associated term for those able to cast spells/weaves. Depending on race, community, and person you are talking to (and abilities/attitude displayed by the magic user in question), you could hear
* witch
* wizard
* caster
* sorcerer
* gifted
* possessed
* weaver
* weaveuser
* incarnate
* tainted
or
* magician.