List of 13-letter words containing

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There are 7 thirteen-letter words containing IPER

ANTIPERIODICS	• antiperiodics n. Plural of antiperiodic. • ANTIPERIODIC n. a drug with an antiperiodic effect.
ANTIPERSONNEL	• antipersonnel adj. (Military) Designed to kill soldiers. • anti-personnel adj. (Military) Referring to devices (typically weapons) intended to harm people in particular. • ANTIPERSONNEL adj. designed for use against troops.
COUNTERSNIPER	• countersniper adj. Serving to prevent the shots of snipers. • countersniper n. A soldier trained to fight against snipers. • COUNTERSNIPER n. a sniper working against another sniper.
QUASIPERIODIC	• quasiperiodic adj. Almost periodic; recurring at irregular intervals. • quasiperiodic adj. (Mathematics, of a function) Such that an increment of a variable leads to a multiplication by some function. • quasiperiodic adj. (Physics, of an oscillation) Having two unrelated periods.
SEMIPERIMETER	• semiperimeter n. (Mathematics) Half the length of a perimeter. • SEMIPERIMETER n. half the perimeter.
SEMIPERMANENT	• semipermanent adj. Neither temporary nor entirely permanent; of indefinite duration. • semi-permanent adj. Alternative form of semipermanent. • SEMIPERMANENT adj. lasting or intended to last for a long time but not permanent.
SEMIPERMEABLE	• semipermeable adj. Permeable to some things and not to others, as a cell membrane which allows some molecules through but… • SEMIPERMEABLE adj. partially but not freely or wholly permeable.

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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English Wiktionary: 48 words
Scrabble in French: 29 words
Scrabble in Spanish: 67 words
Scrabble in Italian: 136 words
Scrabble in German: no word
Scrabble in Romanian: 138 words

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