• 陸上りくじょう — land, track and field
• 大陸たいりく — continent
• 内陸ないりく — inland
• 陸軍りくぐん — army
• 上陸じょうりく — landing (ashore)

陸 combines the meanings of “elevated earth” (阝) and “stop/mark” (坴), originally indicating a high, dry area or plateau. Over time, it came to represent “land” more generally and is often contrasted with sea or air in compound words.

船ふねは 陸りくに上あがった。
The ship landed ashore.

彼かれは 陸軍りくぐんに所属しょぞくしている。
He belongs to the army.

🎧 The character 陸 is pronounced リク (riku) in all common cases. It has no commonly used kun-yomi. You'll see this reading in both native and Sino-Japanese words dealing with terrain and the military.