How I can make motion animation.Some word to change in other with animation.
add->dad(but changing with animation)
Depends. My first thought is to model the text in 3D (with or without depth, using planes is good if you’re simulating 2D text) then use iTween or mesh animation depending on the type of animation you want to do. I find iTween much easier to use than either Blender or Unity animations, so if you’re just rearranging letters I would go that route. If you want the word to actually morph, that is the realm of mesh animation.
This works if you know the text beforehand though. If you need the text to be dynamic (either from a text file or defined in the inspector) you could try to create the meshes dynamically in code, and while iTween would work well with that, I suspect mesh animation would be extremely difficult to get working in that case.
There may also be something available on the asset store that can handle text animation, if you haven’t already looked there.