Synonyms of the word

birdbrain

• n. (colloquial) Someone who is not intelligent.

addlehead

• n. (colloquial) A foolish or dull-witted person.

loon

• n. idler, lout.
• n. (chiefly Scotland, Ulster) boy, lad.
• n. (chiefly Scotland) harlot; mistress.
• n. (chiefly Scotland) simpleton.
• n. (slang) crazy or deranged person.
• n. (Ireland) English Soldier of an expeditionary army in Ireland.
• n. (US, Canada) Any of various birds, of the order Gaviiformes, of North America and Europe that dive for…

misfit

• n. (now rare) An ill-fitting garment.
• n. A failure to fit well; unsuitability, disparity.
• n. A badly adjusted person; someone unsuitable or set apart because of their habits, behaviour etc.
• v. (transitive, intransitive) To fit badly.