• 試験しけん — test / examination
• 実験じっけん — experiment
• 体験たいけん — personal experience
• 経験けいけん — experience
• 受験じゅけん — taking an exam
• 試ためす — to try / to test

験 is commonly used in academic and spiritual contexts. It combines the radical for “horse” (馬) with phonetic and semantic elements, originally referring to trials or omens. Today, it means testing something to learn or prove its value, from science to spiritual signs.

日本語にほんごの試験しけんを受うけました。
I took a Japanese language test.

このアイデアを実験じっけんしてみよう。
Let’s try this idea out in an experiment.

新あたらしい 方法ほうほうを 試ためしてみたい。
I want to try a new method.