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 There are 9 twelve-letter words containing ERIOD| ANTIPERIODIC | • antiperiodic adj. (Medicine) preventing the regular recurrence of symptoms. • antiperiodic adj. (Mathematics) Exhibiting antiperiodicity.
 • antiperiodic n. (Medicine) A drug that prevents the regular recurrence of symptoms.
 |  | APERIODICITY | • aperiodicity n. The condition of being aperiodic. • APERIODICITY n. the state of being aperiodic.
 |  | METAPERIODIC | • METAPERIODIC adj. as in metaperiodic acid. |  | PARAPERIODIC | • PARAPERIODIC adj. as in paraperiodic acid. |  | PERIODICALLY | • periodically adv. In a manner that is regular or periodic. • periodically adv. Intermittently or recurrently.
 • PERIODICAL adv. periodic.
 |  | PERIODONTIAS | • PERIODONTIA n. the branch of dentistry concerned with periodontal diseases. |  | PERIODONTICS | • periodontics n. (Dentistry) The study of supporting structures of teeth—gums, alveolar bone, cementum, and the periodontal… • PERIODONTICS n. the study of gums, as a branch of dentistry.
 |  | PERIODONTIST | • periodontist n. A dentist whose speciality is periodontics. • PERIODONTIST n. a dentist specialising in periodontics.
 |  | PHOTOPERIODS | • photoperiods n. Plural of photoperiod. • PHOTOPERIOD n. the period during every 24 hours when an organism is exposed to daylight.
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 Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.Definitions are short excerpt from the WikWik.org and 1Word.ws.
 
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