pear-shaped vs rotund

pear-shaped and rotund both are adjectives.

Word	Noun	Adjective	Verb	Adverb
pear-shaped	No	Yes	No	No
rotund	No	Yes	No	No

As adjectives, pear-shaped and rotund are synonyms defined as:

Other synonyms of pear-shaped include orotund, round.

pear-shaped (adjective)	rotund (adjective)
(of sounds) full and rich	excessively fat
having a round shape tapered at one end	(of sounds) full and rich
	spherical in shape