Princeton's WordNet

1. alumnus, alumna, alum, graduate, grad(noun)

   a person who has received a degree from a school (high school or college or university)

   Synonyms:
   grad, potassium alum, grade, graduate, potash alum, ammonium alum, ammonia alum, alum, alumnus, alumna

   Antonyms:
   low

2. graduate(adj)

   a measuring instrument for measuring fluid volume; a glass container (cup or cylinder or flask) whose sides are marked with or divided into amounts

   Synonyms:
   grad, alumna, alumnus, alum

   Antonyms:
   low

3. graduate(a), postgraduate(verb)

   of or relating to studies beyond a bachelor's degree

   Antonyms:
   low

4. graduate(verb)

   receive an academic degree upon completion of one's studies

   Synonyms:
   calibrate, fine-tune

   Antonyms:
   low

5. graduate(verb)

   confer an academic degree upon

   Synonyms:
   calibrate, fine-tune

   Antonyms:
   low

6. calibrate, graduate, fine-tune(verb)

   make fine adjustments or divide into marked intervals for optimal measuring

   Synonyms:
   tweak, down, calibrate, graduate, polish, fine-tune, refine

   Antonyms:
   low