| 痴呆 | ちほう | dementia |
| 痴呆症 | ちほうしょう | dementia |
| 呆け | ぼけ, ボケ | idiot, fool, touched in the head (from), out of it (from), space case; funny man (of a comedy duo), (in comedy) silly or stupid line; Alzheimer's (impol) |
| 呆ける | ぼける, ほうける | to grow senile, to be childish with age; to be mentally slow, to be befuddled; to become engrossed (in something) |
| 呆れる | あきれる | to be amazed, to be shocked |
| 呆気 | あっけ | taken aback, dumbfounded |
| 呆気ない | あっけない | not enough, too quick (short, long, etc.) |
| 呆然 | ぼうぜん, ボーゼン, もうぜん | dumbfounded, overcome with surprise, in blank amazement, in a daze |
| 呆然自失 | ぼうぜんじしつ | stupor, stupefaction, trance, (being) dumbfounded |
| 呆れ返る | あきれかえる | to be utterly amazed, to be stunned |
