Perfect rhymes (same vowel sound and ending sound):
* These are rare, as "dismissive" is a bit of an unusual word. You might find some obscure words that rhyme, but they wouldn't be common usage.
Near rhymes (same vowel sound but different ending sound):
* missive - This is a close one, but has a different ending consonant sound.
* expressive - This is another near rhyme that might work in some contexts.
Eye rhymes (look the same but sound different):
* inclusive - This doesn't rhyme phonetically but shares the same spelling pattern.
Slant rhymes (similar sounds but not identical):
* passive
* extensive
* conclusive
The best rhyme will depend on the context and tone of your writing. If you can provide more information about what you're trying to achieve, I might be able to give you a more helpful suggestion!