Intrastate rhymes with:
est, est, estate, interstate, misstate, multistate, reinstate, restate, solid-state, state, tri-state, upstate
Intrastate sounds like:
indirect, interact, interacted, intercede, interceded, intercity, interest, interested, interject, interjected, interrogate, interrogated, intersect, intersected, interstate, intourist, intrawest, intricate, intrigued