Blade
Edge
noun
The kanji and the word are exactly the same. That means they share meanings as well.
The reading is the same as the one you learned with the kanji. But it also has a secondary reading you haven't learned, so here’s a mnemonic for it:
Blade in hand, you charge at your foes hollering "Yah! Eee! Baa!" (やいば). As the blade cuts through them, you cry "Yah! Eee! Baa!" even louder. This battle cry always fuels your fury and doubles the force of your swinging blade. "Yah! Eee! Baa!"
While both readings relate to blades, they have slightly different uses. は is used for any cutting tool's blade or edge, whereas やいば is a little old-fashioned and specifically refers to the blades of swords or knives, often in literary contexts.
心配は要りませんよ、患者さん。私のこの手術用メスの鋭い刃で、すぐに盲腸を取ってあげますからね。
Don't worry, my patient. I can immediately remove your appendix with the sharp blade of my surgical scalpel.