Unrivalled is a related term of preeminent.
As adjectives the difference between unrivalled and preeminent
is that unrivalled is having no rival; better than any possible competitor while preeminent is pre-eminent.
unrivalled
English
Adjective
(-)
having no rival; better than any possible competitor
preeminent
English
Alternative forms
*
* pre-eminent
*
Adjective
(-)
Exceeding others in quality or rank; of outstanding excellence, extremely notable or important.
Derived terms
* preeminence
* preeminently