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There are 14 eight-letter words beginning with OPT

OPTATIVE	• optative adj. Expressing a wish or a choice. • optative adj. (Grammar) Related or pertaining to the optative mood. • optative n. (Grammar) A mood of verbs found in some languages (e.g. Sanskrit, Old Prussian, and Ancient Greek, but…
OPTICIAN	• optician n. A person who makes or dispenses lenses, spectacles. • optician n. A person who sells lenses, spectacles etc. • OPTICIAN n. one who deals in optical goods.
OPTICIST	• opticist n. One who studies optics. • OPTICIST n. one engaged in the study of light and vision.
OPTIMATE	• optimate n. (Historical) A member of the patrician ruling class in republican Ancient Rome; an aristocrat, a noble. • OPTIMATE n. a member of the aristocracy.
OPTIMISE	• optimise v. Non-Oxford British spelling standard spelling of optimize. • OPTIMISE v. to make as effective as possible, also OPTIMIZE.
OPTIMISM	• optimism n. A tendency to expect the best, or at least, a favourable outcome. • optimism n. The doctrine that this world is the best of all possible worlds. • optimism n. The belief that good will eventually triumph over evil.
OPTIMIST	• optimist n. A person who expects a favourable outcome. • optimist n. A believer in optimism. • Optimist n. (Nautical) A small centre-board sailing dinghy designed to train and introduce young children into sailing.
OPTIMIZE	• optimize v. (Originally intransitive) To act optimistically or as an optimist. • optimize v. (Transitive) To make (something) optimal. • optimize v. (Transitive) To make (something) more efficient, such as a computer program.
OPTIMUMS	• optimums n. Plural of optimum. • OPTIMUM n. (Latin) the most favourable point of any condition.
OPTIONAL	• optional adj. Not compulsory; left to personal choice; elective. • optional n. Something that is not compulsory, especially part of an academic course. • optional n. (Programming, sometimes capitalized) In various programming languages, a kind of variable that is assigned…
OPTIONED	• optioned v. Simple past tense and past participle of option. • optioned adj. (In combination) Having the specified kind or number of options. • OPTION v. to grant the act of choosing.
OPTIONEE	• optionee n. The purchaser of a financial option. • OPTIONEE n. one who holds a legal option.
OPTOLOGY	• optology n. (Rare) The study of sight. • OPTOLOGY n. the study of sight.
OPTRONIC	• optronic adj. Optoelectronic. • OPTRONIC adj. pertaining to the science concerned with electronics and light.

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: 32 words
Scrabble in French: 19 words
Scrabble in Spanish: 21 words
Scrabble in Italian: 10 words
Scrabble in German: 17 words
Scrabble in Romanian: 26 words

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