· radiant
· ravishing
· realistic
· reasonable
· reliable
zenith is a complementary word that starts with z. It means on the top, or the best.
An Egyptian word that starts with a r is Ramses
These colors are really not complementing each other.
A word that starts with S and ends with X is sphinx.
The longest word that starts with an "s" and ends with an "r" is "supercomputer."
Retard is a negative word starting with "r".
Resistance
reception
respiratory
repulsive
rise
Revenue