Magic Forums

I have a thought about spells that must be chanted to make it work. Something like " Pour the rejuvenating rain, upon the dry land " and such. So my thought are, can spells be created without chanting any words? I know it is way cooler when you said something and then it is happening but spells are quite long and hard to remember. It is annoying when you miss a word in spells and have to redo the chanting until it is perfect.