List of 13-letter words beginning with

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There are 7 thirteen-letter words beginning with SEI

SEIGNIORSHIPS	• seigniorships n. Plural of seigniorship. • SEIGNIORSHIP n. the office of seignior.
SEISMOGRAPHER	• seismographer n. A person who measures and records earthquakes and other ground vibrations. • seismographer n. A person who studies such records, a seismologist. • SEISMOGRAPHER n. one who uses a seismograph.
SEISMOGRAPHIC	• seismographic adj. Relating to seismography and seismology. • SEISMOGRAPHIC adj. relating to seismography, also SEISMOGRAPHICAL.
SEISMOLOGICAL	• seismological adj. Relating to seismology. • SEISMOLOGICAL adj. related to seismology, also SEISMOLOGIC.
SEISMOLOGISTS	• seismologists n. Plural of seismologist. • SEISMOLOGIST n. one who studies earthquakes.
SEISMOMETRIES	• SEISMOMETRY n. the scientific study of earthquakes.
SEISMONASTIES	• SEISMONASTY n. response to mechanical shock.

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 1Word.ws and WikWik.org.

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See this list for:

English Wiktionary: 19 words
Scrabble in French: 9 words
Scrabble in Spanish: 1 word
Scrabble in Italian: 3 words
Scrabble in German: no word
Scrabble in Romanian: 28 words

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