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