3 Syllablescreatively, datively, natively
4 Syllablesablatively
5 Syllablesdeprecatively, facultatively, iteratively, nuncupatively, palliatively, qualitatively, quantitatively, recitatively, reiteratively
6 Syllablesaccumulatively, administratively, agglutinatively, associatively, authoritatively, commemoratively, communicatively, deliberatively, denominatively, denunciatively, determinatively, discriminatively, evaporatively, exaggeratively, illuminatively, interpretatively, originatively, reduplicatively, regeneratively, remuneratively
7 Syllablesuncommunicatively