堆石[taiseki] (terminal) moraine
堆積[taiseki] pile (of things)
堆肥[taihi] compost
堆朱[tsuishu] red lacquerware with patterns carved in relief
堆積作用[taisekisayou] sedimentation

堆積学[taisekigaku] sedimentology
堆積岩[taisekigan] sedimentary rock
堆積物[taisekibutsu] sediment
堆積層[taisekisou] sedimentary layer
堆積輪廻[taisekirinne] cycle of sedimentation

シュタイナー学校[shutainaagakkou] Steiner school
ビジネススクール入学共通試験[bijinesusukuurunyuugakukyoutsuushiken] business school entrance test
ロボット工学[robottokougaku] robotics
位相幾何学[isoukikagaku] topology
易学[ekigaku] study of divination

遺伝学[idengaku] genetics
遺伝子工学[idenshikougaku] genetic engineering
医化学[ikagaku] medical chemistry
医科大学[ikadaigaku] medical school
医学[igaku] medical science

ゴミ集積場[gomishuusekijou] village garbage collection point
欝積[usseki] accumulation (e.g. of emotions, grievances, etc.)
沖積[chuuseki] alluvial
沖積期[chuusekiki] alluvial period
沖積世[chuusekisei] alluvial epoch (i.e. the Holocene epoch)

沖積層[chuusekisou] alluvium
沖積土[chuusekido] alluvial soil
下積み[shitazumi] lowest social strata
求積[kyuuseki] mensuration
経路積分[keirosekibun] path integral (physics)