Synonyms for Noteworthy:

adj.

all (adjective)
remarkable, notable.
different (adjective)
unusual.
distinguished (adjective)
memorable.
especial (adjective)
unique.
exceptional (adjective)
outlandish, peculiar, outstanding, excellent, fantastic, superior, fabulous, unprecedented, extraordinary, sensational, remarkable, phenomenal, exotic, unusual, exceptional, Wonderous, notable, striking, marvelous, novel, wonderful, miraculous.
important (adjective)
influential, eminent, crucial, big-wig, grave, big-name, heavyweight, pivotal, unique, momentous, high-powered, considerable, outstanding, remarkable, prominent, notable, memorable, important, critical, salient, extraordinary, unusual, significant, exceptional, earthshaking, world-shaking, consequential, serious, distinguished.
irregular (adjective)
exceptional.
reputable (adjective)
memorable, fabled, notorious, acclaimed, preeminent, popular, pronounced, celebrated, renowned, illustrious, reputed, remarkable, elevated, exalted, legendary, famous, esteemed, Famed, notable, mythical, distinguished, well-known, prominent.

n.

awe-inspiring, admirable, heroic, commendable, respected, praiseworthy, awesome, enviable. noteworthy (noun)
remarkable, important, notable, significant, worthy.
outstanding (noun)
unique.

Other synonyms:

admirable, praiseworthy, commendable, respected, enviable, awe-inspiring. Other relevant words:
enviable, heroic, commendable, praiseworthy, awe-inspiring, awesome, admirable, unique, respected, worthy, significant.

Usage examples for noteworthy

  1. The legislation of the first parliament during its five years of existence was noteworthy in many respects. – Canada under British Rule 1760-1900 by John G. Bourinot
  2. In chemistry the advances made during the thirteenth, fourteenth, and fifteenth centuries were even more noteworthy than those in any other department of science. – Catholic Churchmen in Science by James J. Walsh
  3. Roman Catholicism is an element of the cement which holds creole society together; and it is noteworthy that other creeds are not represented. – Two Years in the French West Indies by Lafcadio Hearn