Nouns

(n)alum1, ammonia alum, ammonium aluma white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
(n)alum1, potassium alum, potash aluma white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
(n)alum1a double sulphate of aluminum and potassium that is used as an astringent (among other things)
(n)alum2, graduate, grada person who has received a degree from a school (high school or college or university)