5
ghost(noun, shade, spook, spectre, specter)
3
Flying Dutchman
2
UFO
2
flying saucer
2
shade
2
specter
2
spectre
2
spook
2
unidentified flying object
2
wraith
11 years ago|85 views|share |citing 
APASmart Define. (2015). phantom thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/phantom/thesaurus/narrower
ChicagoSmart Define. 2015. "phantom thesaurus" https://smartdefine.org/phantom/thesaurus/narrower (accessed September 20, 2026).
HarvardSmart Define 2015, phantom thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/phantom/thesaurus/narrower>.
MLASmart Define. "phantom thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/phantom/thesaurus/narrower>