A male sheep or goat is called a ram. If you're a fan of reading your horoscope, you might notice that Aries, usually considered the first sign of the zodiac, is represented by a ram.
Another kind of ram is a "battering ram," a tool for forcing a heavy door open or breaking a hole in a wall. This kind of ram comes from the male sheep and his powerful horns — and so does the verb ram: "I watched the rams ram their heads into each other as they battled over territory." Some word experts think the word stems from the Old Norse rammr, "strong."