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extraterrestrial spacecraft

NOUN

flying saucer

Synonyms

STRONGEST

spaceship

WEAK

UFO extraterrestrial vessel spacecraft unidentified flying object

NOUN

UFO

Synonyms

STRONG

rocket spaceship

WEAK

flying saucer rocketship

NOUN

unidentified flying object

Synonyms

WEAK

UFO flying saucer spacecraft spaceship

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.