欠陥【けっかん】
defect, fault, flaw, deformity, deficiency, shortage, gap
不可欠【ふかけつ】
indispensable, essential
欠席【けっせき】
absence, non-attendance
欠点【けってん】
fault, defect, flaw, weak point, weakness, shortcoming, drawback, failure (in an examination), failing grade
補欠【ほけつ】
filling a vacancy, supplementation, substitute, deputy, alternate, spare
欠如【けつじょ】
lack, absence, shortage, deficiency, privation
欠員【けついん】
vacancy, vacant position
欠損【けっそん】
deficit, shortage, loss, being partially broken, being partially missing, being partially removed
欠乏【けつぼう】
deficiency, insufficiency, shortage, lack, want, dearth, scarcity
出欠【しゅっけつ】
attendance or absence