Words with the Suffix -ative:
Adjectives:
* Active
* Alternative
* Assertive
* Associative
* Attractive
* Comparative
* Competitive
* Confirmatory
* Consecutive
* Conservative
* Constructive
* Cooperative
* Creative
* Cumulative
* Declarative
* Deductive
* Definitive
* Demonstrative
* Descriptive
* Determinative
* Diagnostic
* Directive
* Disruptive
* Effective
* Elusive
* Evaluative
* Evocative
* Exhaustive
* Explanatory
* Explosive
* Extensive
* Facilitative
* Fictive
* Formative
* Generative
* Illustrative
* Implicative
* Indicative
* Informative
* Innovative
* Inquisitive
* Instructive
* Integrative
* Interactive
* Interpretive
* Intuitive
* Investigative
* Iterative
* Legislative
* Liberative
* Lucrative
* Magnificative
* Manipulative
* Narrative
* Negative
* Nominative
* Objective
* Operative
* Participative
* Perceptive
* Persuasive
* Possessive
* Predictive
* Preventive
* Productive
* Progressive
* Protective
* Qualitative
* Quantitative
* Reactive
* Recessive
* Reflective
* Regressive
* Relative
* Representative
* Restorative
* Retentive
* Repetitive
* Selective
* Sensitive
* Significative
* Simulative
* Substantive
* Suggestive
* Supportive
* Tentative
* Therapeutic
* Transformative
* Translative
* Ultimative
* Valuative
Nouns:
* Alternative
* Initiative
* Narrative
Verbs:
* Activate
* Contemplate
* Cultivate
* Evaluate
* Illuminate
* Motivate
* Negotiate
* Nominate
* Operate
* Propagate
* Stimulate
* Validate
This is not an exhaustive list, but it covers many common words using the "-ative" suffix. Remember, depending on the context, the meaning of the word can change!