pumpkin-shaped vs oblate

pumpkin-shaped is not a noun while oblate is a noun.

Word	Noun	Adjective	Verb	Adverb
pumpkin-shaped	No	Yes	No	No
oblate	Yes	Yes	No	No

As adjectives, pumpkin-shaped and oblate are synonyms defined as:

pumpkin-shaped and oblate: having the equatorial diameter greater than the polar diameter; being flattened at the poles

pumpkin-shaped (noun)	oblate (noun)
	a lay person dedicated to religious work or the religious life

pumpkin-shaped (adjective)	oblate (adjective)
having the equatorial diameter greater than the polar diameter; being flattened at the poles	having the equatorial diameter greater than the polar diameter; being flattened at the poles