Here's what rhymes with diameter.
parameter hexameter Words that almost rhyme with diameter
janitor manager catheter garrotter traveller massacre traveler bachelor fastener rattler saddler paddler waggoner wagoner fashioner dampener prattler caroler calendar passenger capacitor chancellor examiner capsular lavender tabular analyser canister challenger handsomer calender falconer lackluster wrangler canvasser lacklustre bannister canceller dangler banqueter straddler candler ransomer jangler vascular grandmother granular triangular glandular valvular oracular scapular scavenger vernacular spectacular perivascular nongranular rectangular microvascular neurovascular unspectacular cardiovascular cerebrovascular