WordWeb Online

1. Experiencing or showing fear
   "a fearful glance"; "fearful of criticism"
    
2. Causing fear or dread or terror
   "a fearful howling"
   - awful, dire, direful, dread, dreaded, dreadful, fearsome, frightening, horrendous, horrific, terrible
    
3. Lacking courage; ignobly timid and faint-hearted
   - cowardly
    
4. Extremely distressing
   "fearful slum conditions"
   - frightful
    
5. Timid by nature or revealing timidity
   "cast fearful glances at the large dog"
   - timorous, trepid

See also: afraid, alarming, bad, caitiff [archaic], chicken, chickenhearted, chicken-livered, cowardice, cowardliness, craven, dastard, dastardly, faint, fainthearted, faint-hearted, fearfully, fearfulness, 'fraid [non-standard], funky, ignoble, lily-livered, poltroon, poor-spirited, pusillanimous, recreant [archaic], timid, unmanly, white-livered, yellow, yellow-bellied

Encyclopedia: Fearful