Moreover, adv.
Etymology: [More + over.]
Beyond what has been said; further; besides; in addition; furthermore; also; likewise. Moreover, he hath left you all his walks. Shak.
Syn. -- Besides, Moreover. Of the two words, moreover is the stronger and is properly used in solemn discourse, or when what is added is important to be considered. See Besides.
Shades of meaning
Fernald has no entry of its own for moreover; he lists it under but.
He lists it without comment; the entries above explain its neighbors.