Person vs enter
人vs入
Look for: 人 opens wider at the bottom; 入 has the crossing entry line. Words: 日本人 / 入口.
Soil vs samurai
土vs士
Look for: in 土, the lower horizontal is longer; in 士, the upper horizontal is longer. Word: 土曜日.
Not yet vs end
未vs末
Look for: 未 has the longer lower line; 末 has the longer upper line. Words: 未来 / 週末.
Day vs eye
日vs目
Look for: 目 has an extra inner horizontal. Words: 毎日 / 目.
Big vs dog
大vs犬
Look for: 犬 adds one small dot at the upper right. Words: 大学 / 犬.
Thousand vs dry
千vs干
Look for: 千 has a short top stroke; 干 begins with the long upper horizontal. Word: 千円.
Tree vs book
木vs本
Look for: 本 adds a baseline mark near the root. Words: 木曜日 / 本.
King vs jewel
王vs玉
Look for: 玉 adds a dot. Words: 王様 / 玉.
Right vs left
右vs左
Look for: the lower component changes: 口 in right, 工 in left. Words: 右 / 左.
Rain vs electricity
雨vs電
Look for: both start with rain; 電 adds the lower field-and-hook structure. Words: 雨 / 電車.