The document discusses common noun endings in English. It provides 15 common noun (thing) endings such as -ism, -ness, -ion, -ment, -ity, -age, -ship, -th, -dom, -hood, -ure, -cy, -try, -logy, and -graphy. It also lists 14 common noun (person) endings like -or, -er, -ee, -ist, and -ician. The document concludes with an example worksheet for forming nouns from other parts of speech using suffixes like -ment, -ance, -er, -ist, -an, and -ess.