Extremely rare Synonyms

Extremely replaced

powerful rare

uncommon rare

Definitions for Extremely

(adverb) to a great degree
(adverb) to an extreme degree
(adverb) to a high degree or extent; favorably or with much respect

ER abbreviation

ER is an abbreviation for Extremely Rare

What does ER stand for?

ER stands for "Extremely Rare"

Definitions for Rare

(adjective) being out of the ordinary
(adjective) having qualities that appeal to a refined taste
(adjective) not often occurring or repeated