Is other side an adverb

An adverb is a descriptive Word that modifies a verb. 'Other side' does not modify a verb (eg the sentence "Dave other side glanced at Karen, who melted" does not make sense, because 'other side' isn't an adverb), and therefore is not an adverb. In a sentence that uses 'other side': "Dave met Karen at the other side of the park," 'other' is modifying 'side,' a noun, and 'side' is simply a noun, as it is a place, not a description of a verb. (Other is an adjective.)