They are written the same. They have different pronunciation and meaning.

• With the orange buttons you can hear the pronunciation of the associated word.
• Study them using the button and Praat, record your imitation and let yourself decide when you already say it.
• With the buttons you can watch videos from YouGlish.com that contain the word. Remember the facilities that it offers.
• With links to Merriam-Webster's you can verify the word.