| donkey |
a stubborn, foolish, or stupid person. [1/3 definitions] |
| doodle |
to spend (time) on pointless or foolish activity. [1/3 definitions] |
| dopey |
stupid or foolish. [1/2 definitions] |
| dotage |
foolish or exaggerated affection. [1/2 definitions] |
| dotty1 |
foolish or ridiculous. [1/4 definitions] |
| drivel |
foolish or silly speech or ideas. [1/5 definitions] |
| dunce |
an unintelligent, foolish, or ignorant person. |
| fatuity |
a stupid or foolish act, gesture, utterance, or attitude. [1/2 definitions] |
| fatuous |
smugly foolish or stupid. |
| featherbrain |
a foolish or flighty person; scatterbrain. |
| flibbertigibbet |
a foolish, flighty, or talkative person. |
| flummery |
foolish or meaningless talk or flattery. [1/2 definitions] |
| folderol |
foolish speech or notions; nonsense. [1/2 definitions] |
| folly |
an unwise or foolish undertaking, such as an expensive project that fails. [1/4 definitions] |
| fool |
(informal) lacking good sense; silly; foolish. [1/11 definitions] |
| gibber |
speech that is incoherent or foolish. [1/2 definitions] |
| goof |
(informal) a foolish mistake; blunder. [3/4 definitions] |
| goofy |
(informal) typical of a goof; silly, stupid, or foolish. |
| guff |
foolish talk; nonsense. [1/2 definitions] |
| half-baked |
(informal) lacking in judgment; foolish. [1/3 definitions] |
| half-wit |
one who is stupid or foolish. [1/2 definitions] |