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15-Letter Words Start with 'semi'

There are 13 15-letter words that start with 'semi'.

semiabstraction semicentennials
semicolonialism semicrystalline
semicylindrical semidocumentary
semilogarithmic semipornography
semiretirements semisubmersible
semiterrestrial semitranslucent
semitransparent

Note: These 13 15-letter words that start with 'semi' are found from the USA & Canada version of the tournament Scrabble word list.