besides

I

(New American Roget's College Thesaurus)

adv. also, further, moreover. See addition.

II

(Roget's IV) modif.

Syn. in addition to, additionally, moreover, over and above, supplementary to, added to, likewise, further, furthermore, beyond, exceeding, secondly, more than, apart from, aside from, extra, in distinction to, in excess of, plus, also, in other respects, exclusive of, with the exception of, as well as, not counting, other than, too, in conjunction with, conjointly, together with, along with, else, to boot*, on top of that*, on the side*, and all*, into the bargain*.

III

(Roget's 3 Superthesaurus) adv.

in addition, as well, moreover, plus, also.

IV

(Roget's Thesaurus II) adverb In addition: additionally, also, further, furthermore, item, likewise, more, moreover, still, too, yet. Idioms: as well, to boot. See INCREASE.