watermelon-shaped vs prolate

watermelon-shaped and prolate both are adjectives.

Word	Noun	Adjective	Verb	Adverb
watermelon-shaped	No	Yes	No	No
prolate	No	Yes	No	No

As adjectives, watermelon-shaped and prolate are synonyms defined as:

watermelon-shaped and prolate: having the polar diameter greater than the equatorial diameter

watermelon-shaped (adjective)	prolate (adjective)
having the polar diameter greater than the equatorial diameter	having the polar diameter greater than the equatorial diameter
	rounded like an egg