How to spell OPTINAL correctly?

Possible correct suggestions for the misspelling "optinal" are "optional", "optimal", and "optician". "Optional" refers to something that is not compulsory or required. "Optimal" relates to the best or most favorable condition or situation. "Optician" is a professional who specializes in the fitting and selling of eyeglasses and contact lenses.

• optical The optical illusion made it seem like the room was spinning.
• optimal The optimal time to apply sunscreen is before going outside in the sun.
• opting
• optional The salad dressing is optional, so you can leave it off if you prefer.
• ordinal The ordinal number for "third" is "3rd".

Attenttion

• attention
• attentions
• attenuation
• inattention