Hmmmmm, keyboard, synth. I'm trying to figure the easiest way to interpret the difference.
Both terms are fairly general. A keyboard is just that, a keyboard that may or may not have editting capabilities. A keyboard can also refer to a controller, which has no sounds associated with it. A synth...I'd have to say the fact that you actually have the ability to create sounds from scratch or with the aid of sampled material, which in turn you can edit or, or modify. To me that's where the true "synth" term would come into play as you are creating a "synthetic" sound, mind you having said that, any electronic device is going to result in a "synthetic" sound...correct??
In a nutshell...what you call it is up to you. What it's capabilities are is what really differentiates "keyboard" from "synth".
Here's another one for ya..."workstation".
There are a lot of good synths/keyboards/workstations...call them what you will, out there. Choose the unit that's right for you. You're gonna read a lot of comments (pro & con) about Roland this, Korg that, Yamaha this, and Alesis that...the list goes on. Just make sure that whatever you decide on is right for YOU. After all, you're the one using it.
Good Luck Raziel....and welcome aboard.
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...L