You could see this in the same Dictionary.
cad


/kæd/ Pronunciation Key - Show Spelled Pronunciation[kad] Pronunciation Key - Show IPA Pronunciation –noun 1.an ill-bred man, esp. one who behaves in a dishonorable or irresponsible way toward women.
gad1


/gæd/ Pronunciation Key - Show Spelled Pronunciation[gad] Pronunciation Key - Show IPA Pronunciation verb, gad·ded, gad·ding, noun –verb (used without object) 1.to move restlessly or aimlessly from one place to another: to gad about.
There is a distinction difference, don't you see?
To my great regret I'm not a literate native English speaker. But I try to be an attentive and thoughtful reader.