Common words that rhyme with effective include ineffective, introspective, prospective, reflective, respective, destructive, attractive, productive, interactive, active, unproductive, alternative, expletive, relative and inoperative.
The medicine was ineffective against the infection.
The objective is clear now.
Their efforts had a collective impact.
A mirror has a reflective surface.
Her perspective changed after traveling.
The dress made her feel attractive.