It depends which Americans you are referring to. There are many countries in America.
Center.
Americans spell it "centimeters".
In addition to 'center' you can spell it like 'centre'
they spell it RESTERANT
you were kinda close but this is how you spell it center
They spell it the same way Americans do.
The letters will spell center or recent.
In French center is spelled centre. In American English you spell center with er not re. In British English it is spelled centre.
Center in US English and Centre in British English.
Favorable
centering
Americans usually spell buttock as "buttock," which refers to each of the two round fleshy parts that form the backside.