Chickened is a colloquial term used to describe someone who is timid or lacks courage. There are many synonyms for the word chickened that convey a similar meaning. Such synonyms include coward, scaredy-cat, chicken-hearted, yellow-bellied, spineless, gutless, faint-hearted and many more. All these words describe someone who lacks the bravery to face a challenge or situation and typically retreats instead. Using words like this can help to convey a strong sense of cowardice, and they can be useful to describe any situation where someone has backed down from a challenge or opportunity due to fear.