| CENTENARIANISMS | • CENTENARIANISM n. the state of being a centenarian. |
| MERCENARINESSES | • MERCENARINESS n. the state of being mercenary. |
| MILLENARIANISMS | • millenarianisms n. Plural of millenarianism. • MILLENARIANISM n. the belief that an ideal society will be produced in the near future, also MILLENARISM, MILLENNIALISM, MILLENNIANISM, MILLENNIARISM. |
| NOVOCENTENARIES | • NOVOCENTENARY n. a 900th anniversary. |
| OCTOCENTENARIES | • octocentenaries n. Plural of octocentenary. • OCTOCENTENARY n. an eight-hundredth anniversary, also OCTINGENARY, OCTINGENTENARY. |
| POSTMILLENARIAN | • postmillenarian n. One who believes in postmillennialism. • POSTMILLENARIAN n. a believer in postmillennialism. |
| PREMILLENARIANS | • premillenarians n. Plural of premillenarian. • PREMILLENARIAN n. a believer in the premillennial coming of Christ. |
| QUADRAGENARIANS | • quadragenarians n. Plural of quadragenarian. • QUADRAGENARIAN n. a person who is forty years old, or between forty and fifty. |
| QUADRINGENARIES | • quadringenaries n. Plural of quadringenary. • QUADRINGENARY n. a four-hundredth anniversary or its celebration. |
| QUATERCENTENARY | • quatercentenary n. A four-hundredth anniversary. • QUATERCENTENARY n. a four-hundredth anniversary. |
| QUINCENTENARIES | • quincentenaries n. Plural of quincentenary. • QUINCENTENARY n. a five-hundredth anniversary, also QUINGENTENARY. |
| QUINGENTENARIES | • QUINGENTENARY n. a five-hundredth anniversary, also QUINCENTENARY. |
| QUINQUAGENARIAN | • quinquagenarian n. (Obsolete, rare) Synonym of pentecoster: an officer who commands 50 men. • quinquagenarian n. Synonym of fiftysomething: a person between 50 and 59 years old. • quinquagenarian adj. (Obsolete, rare) Of or related to command over 50 men. |
| SEPTUAGENARIANS | • septuagenarians n. Plural of septuagenarian. • SEPTUAGENARIAN n. a person whose age is in the seventies. |
| SESQUICENTENARY | • sesquicentenary n. A 150-year anniversary. • SESQUICENTENARY n. a hundred and fiftieth anniversary. |