屯⇒ 屯 tún/zhūn, to station (soldiers)/to store up/village, difficult/stingy 屯子 túnzi, village 屯兵 屯粮
垦⇒ 开垦 kāikěn, [開墾], to clear a wild area for cultivation/to put under the plow 垦 kěn, [墾], to reclaim (land)/to cultivate 垦荒 kěnhuāng, [墾荒], to open up land (for agriculture)