Sharon's POV—
'Wordless Magic' is not a type of magic. It's like derivative of magic with respect to time. Here, time refers to the time taken to do spell. For normal spells, the time taken is more and lacks the factor called, 'Constant change.' This means in chanting magic; the rate of change of magical flow or mana is less compared to wordless magic.
Suppose, let's take wind magic. The chant goes like this— "O' vivacious wind I call forth you, turning your grace into disgrace, I summon you in your most vicious form: Wind Destroyer." A top-class mage has to say all these lines to use this spell. If they don't have ability that is.
An ability user doesn't need to utter any words to perform a spell, ranging from weak to strong. They can do it wordlessly. Therefore, I can say only ability users are capable of wordless magic.