First and Optimum

First adjective - Coming before all others in time or order.

Optimum and first are semantically related. In some cases you can use "Optimum" instead an adjective "First".

Nearby Word: firstly

Optimum adjective - Most desirable possible under a restriction expressed or implied.

First and optimum are semantically related. Sometimes you can use "First" instead an adjective "Optimum".

Nearby Words: optimal, optimization, optimize, optimise, optimally