Yes, ‘simpler’ is indeed a word. It is the comparative form of the adjective ‘simple.’ The word ‘simple’ means something that is easy to understand or not complicated. When we compare two things and one is easier or less complicated than the other, we use ‘simpler.’
For example:
- This math problem is simpler than the one we did yesterday.
- Her explanation was simpler to understand.
So, ‘simpler’ is correctly used when comparing the simplicity of two things.