| Kerogen | (Environmental Engineering) A fossilized organic material present in oil shale and some other sedimentary rocks. |
| Ketones | (Environmental Engineering) Organic compounds with two hydrocarbon groups bonded to a carbonyl group. |
| Keene's Cement | (Concrete Engineering) A finely ground high density plaster composed of anhydrous, (calcined or "dead burned") gypsum, the set of which is accelerated by the addition of other materials. |
| Kelly Ball | (Concrete Engineering) A device for determining the consistency of fresh concrete. It is sometimes used as an alternative to the slump test. |
| kampong | หมู่บ้าน , ละแวก |
| kaolin | ดินขาวสำหรับทำเครื่องถ้วยชาม |
| keep | หอคอยสูง |
| kerb (curb) | ขอบ |
| kerf | รอยตัดของเลื่อย |
| kennel | บ้านสุนัข |