phantom
phan-tom
noun
A ghost or a supernatural apparition; something that seems real but isn't.
"The old castle was said to have a phantom."
adjective
Existing only in appearance; not real or tangible, often describing a sensation.
"He felt a phantom ache in his missing arm."
Thesaurus
Synonyms: apparition, fantasm, phantasma, phantasm, shadow, unreal, specter, spectre