Synonyms for Am (same or very similar meaning)
WordNet sense 1 (a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms):
americiumWordNet sense 2 (a master's degree in arts and sciences):
ma, Master of Arts, Artium MagisterWordNet sense 3 (modulation of the amplitude of the (radio) carrier wave):
amplitude modulationFrom the ODE community, based on WordNetadd/edit