Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.
Class I. Words Expressing Abstract RelationsSection VI. Time
1. Absolute Time
108. [Definite Duration, or Portion of Time.] Period.
NOUN:PERIOD; second, minute, hour, day, week, month, octave, novena [L.], semester, quarter, year, decade, decennium, luster or lustrum, indiction; cycle-, era- of indiction (or indictions); quinquennium, lifetime, generation; epoch, era, epact, ghurry or ghari [India], lunation, moon.century, age, millennium; annus magnus [L.], annus mirabilis [L.].
ADJECTIVE:horary; hourly, annual, epochal (periodical) [See Identity]; ante bellum [L.].