How do I enter and save a word when texting, that isn’t recognised by the Galaxy S III handset?

[Tamaracastillo1990]

How do I enter and save a word when texting, that isn’t recognised by the Galaxy S III handset?

 

[shubham6300]

Which keyboard are you using? If it's stock one than just tap it when it shown in prediction and tap it again when it asks to save the word.