The Oxford Thesaurus An A-Z Dictionary of Synonyms - shadown.

1) darkness, gloom, dimness, dusk, obscurity: In the shadow I could make out the dim outline of a figure. 2) cover, screen, covering, shield, veil, curtain, protection, concealment: He stole past the sentry under the shadow of darkness. 3) hint, intimation, suggestion, suspicion, trace, vestige; remnant: I do not have the slightest shadow of doubt that she is telling the truth. Martin is merely a shadow of his former robust self. 4 cloud, blight, curse: A terrible shadow has fallen upon the family name. 5) See shade, 4, above. 6) companion, alter ego, comrade, Colloq sidekick, crony, chum, (bosom) pal, US (bosom) buddy: Boswell was Johnson's shadow for almost twenty years. --v. 7) follow, trail, track, dog, stalk, pursue, trace, Colloq tail, US and Canadian bird-dog: For a month detectives shadowed the suspect.