• 岩いわ — rock
• 岩山いわやま — rocky mountain
• 岩石がんせき — rock / stone
• 火成岩かせいがん — igneous rock
• 岩塩がんえん — rock salt
• 岩場いわば — rocky area / rock face
• 溶岩ようがん — lava

岩 combines 山 (mountain) and 石 (stone), representing a large, solid rock. It often appears in nature, geology, and place names.