repulsive
its not exactly a synonym of ugly, but 'vile' maybe.
ugly
atrocious
An Egyptian word that starts with a r is Ramses
ugly
ugly, unit, upon
there is Unitary and Ugly and Unaprishiative.
A word that starts with S and ends with X is sphinx.
SMILER - There is a mile between the s and the r!
respiratory
riet
respiration