Synonyms: spooky, skittish, flighty, nervous
Definition: unpredictably excitable (especially of horses)
Similar words: excitable
Definition: easily excited
Synonyms: flighty, flyaway, head-in-the-clouds, scatterbrained
Definition: guided by whim and fancy
Usage: flighty young girls
Similar words: frivolous
Definition: not serious in content or attitude or behavior
Usage: a frivolous novel; a frivolous remark; a frivolous young woman