puerile Synonyms

juvenile adolescent weak childish jejune boyish youthful thoughtless trifling teenage teen stupid sophomoric silly senseless trivial unfledged lamebrained dootsie birdbrained kiddish goofy half-baked boneheaded young unsophisticated unripe ridiculous pubescent naive frivolous foolish foolhardy fatuous crazy childlike callow babyish baby girlish green idiotic mad light-minded irresponsible infantine infantile inexperienced inane immature