2 syllables:
data of, date of, dative, eight of, fate of, gait of, gate of, great of, late of, mate of, nativ, native, plate of, rate of, sative, slate of, spate of, state of, strait of, trait of, weight of

3 syllables:
cessative, creative, cunctative, debate of, equative, estate of, frustrative, gestative, illative, innative, ipsative, locative, mutative, non-native, nonnative, placative, probative, pulsative, quiddative, rotative, substrative, translative, unnative, update of, vitative, writative

4 syllables:
abdicative, abnegative, abrogative, aggravative, agitative, allocative, altercative, animative, annotative, appellative, approbative, arbitrative, auscultative, automative, calculative, capitative, caritative, catenative, circulative, cogitative, colliquative, comitative, commentative, commutative, compellative, compensative, compulsative, concentrative, condensative, confrontative, conjugate of, conjugative, connotative, consecrative, consummative, conversative, copulative, degradative, denigrative, denudative, deprecative, designative, detonative, devastative, deverbative, deviative, dissipative, dubitative, educative, emanative, emulative, entitative, exclamative, exhortative, expiative, extirpative, exudative, fabricative, facultative, frequentative, glutinative, gravitative, hesitative, imbricative, imitative, impetrative, incarnative, inchoative, incrassative, incubative, infiltrative, innovative, instigative, insulative, integrative, irrigative, irritative, isolative, iterative, lacerative, legislative, limitative, lubricative, mediative, meditative, meliorative, memorative, ministrative, miscreative, mitigative, modulative, motivative, mutilative, nauseative, obligative, obviative, oppilative, oscillative, oxidative, penetrative, perforative, permeative, personative, perturbative, procreative, propagative, punctuative, qualitative, quantitative, quidditative, radiative, re-creative, rebarbative, recreative, regulative, renovative, replicative, reprobative, retardative, segregative, similative, simulative, singulative, stimulative, stipulative, suffocative, titillative, tolerative, transmutative, ulcerative, uncreative, undulative, urinative, usitative, vegetative, ventilative

5 syllables:
abirritative, accelerative, accommodative, accumulative, adjudicative, administrativ, administrative, affiliative, affinitative, agglutinative, alleviative, alliterative, amalgamative, ameliorative, annihilative, anticipative, appreciative, appropriative, asphyxiative, assimilative, associative, authoritative, capacitative, coagulative, collaborative, commiserative, conglutinative, consolidative, continuative, cooperative, debilitative, deliberative, delimitative, delineative, denunciative, deoppilative, depreciative, disintegrative, dissimulative, dissociative, elucidative, emancipative, emasculative, enumerative, enunciative, eradicative, evacuative, evaluative, evaporative, exaggerative, excogitative, exfoliative, exhilarative, exonerative, extenuative, extrapolative, exulcerative, facilitative, habilitative, incogitative, inirritative, inoculative, interpolative, interpretative, interrogative, intoxicative, investigative, invigorative, irradiative, manifestative, manipulative, necessitative, non-perturbative, nonimitative, obliterative, opinionative, precipitative, premeditative, procrastinative, prognosticative, proliferative, pronunciative, reciprocative, recommendative, refrigerative, reintegrative, reiterative, rememorative, renunciative, repudiative, resuscitative, reverberative, self-regulative, substantiative

6 syllables:
antioxidative, deteriorative, disassimilative, disassociative, inappreciative, inauthoritative, interpenetrative, neurovegetative, nonassociative, nonprognosticative, quasi-legislative, recapitulative, rehabilitative, semiquantitative, unappreciative

7 syllables:
anticoagulative, antiproliferative, isoagglutinative, lymphoproliferative, surface-assimilative

8 syllables:
myeloproliferative

3 syllables:
sensitive, relative, sedative, decorative, negative, tentative, expletive, genitive

4 syllables:
executive, insensitive, contemplative, blood relative, preventative, competitive, consecutive, augmentative, gram-negative, light-sensitive, nonsensitive

5 syllables:
double negative, supersensitive, representative, photosensitive, argumentative, chief executive, noncompetitive, top executive

6 syllables:
account executive, electronegative, business executive, nonrepresentative

7 syllables:
account representative, corporate executive, legal representative, union representative

8 syllables:
personal representative, registered representative

10 syllables:
united states trade representative