Here's what rhymes with exhaustive.

Consider these alternatives

extensive / comprehensive comprehensive / extensive laborious / glorious voluminous / luminous authoritative / native undertaken / taken examination / information review / you investigation / education enquiry / highly compile / while investigations / relations systematic / dramatic inquiry / highly detail / male undertaking / taking evaluation / relation searches / emerges encyclopedic / orthopedic toxicology / quality biographical / classical conclusive / inclusive concise / price analyses / these undertake / take informative / formative inquiries / enquiries