no. for example can you say i walked top to the car. that would
just not make sense. adverbs describe verbs and top does not
describe a verb.
Would on top be a prepositional phrase?
"On top" is an adverb, similar to "there" or "here." For example: Look in your lunch bag. I put the apple on top." Compare it to "Look in your lunch bag. I put the apple there.""On top of" is a prepositional phrase. For example: The apple is on top of the sandwich.The adverb tells where the apple is.The prepositional phrase tells where the apple is in relation to another item which is mentioned in the sentence.