1. (noun) alum, ammonia alum, ammonium alum
a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
Synonyms: potash alum, potassium alum, graduate, alum, ammonium alum, ammonia alum, alumna, alumnus, grad
2. (noun) alum, potassium alum, potash alum
a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
Synonyms: potash alum, potassium alum, graduate, alum, ammonium alum, ammonia alum, alumna, alumnus, grad
3. (noun) alumnus, alumna, alum, graduate, grad
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
4. (noun) alum
a double sulphate of aluminum and potassium that is used as an astringent (among other things)
Synonyms: potash alum, potassium alum, graduate, ammonium alum, ammonia alum, alumna, alumnus, grad
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Synonyms for alum 
