timid has 7 distinct synonyms spread across 3 of its 4 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its 2 recorded opposites are bold, brave.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
showing fear and lack of confidence
lacking conviction or boldness or courage
“faint heart ne'er won fair lady”
Synonyms, antonyms and the broader and narrower relations for timid come from Princeton University’s WordNet. Full sources and licences.