Overly and Over

Overly adverb - Beyond a normal or acceptable limit.

Over is a synonym for overly in excessively topic. In some cases you can use "Over" instead the word "Overly" as an adverb or an adjective.

Over adverb - From one side to the other of an intervening space.

Overly is a synonym for over in in addition topic. You can use "Overly" instead the word "Over" as an adverb or an adjective.