Harboring rhymes with:
belaboring, clobbering, dismembering, laboring, lumbering, neighboring, numbering, outnumbering, remembering, schubring, slobbering, slumbering, sobering
belaboring, clobbering, dismembering, laboring, lumbering, neighboring, numbering, outnumbering, remembering, schubring, slobbering, slumbering, sobering