The Correct spelling is: similar
Common misspellings of the word similar are:
How do you spell similar?. It is not similiar or even simmilar for that matter!
- Related in appearance or nature; alike though not identical.
- Mathematics. Having corresponding angles equal and corresponding line segments proportional. Used of geometric figures: similar triangles.
[French similaire, from Latin similis, like.]similarly sim'iÂ·larÂ·ly adv.