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