First and Rudimental

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

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

Nearby Word: firstly

Rudimental adjective - Of or relating to the simplest facts or theories of a subject.

First and rudimental are semantically related. Sometimes you can use "First" instead an adjective "Rudimental".