oval vs ovate

oval is a noun but ovate is not a noun.

Word	Noun	Adjective	Verb	Adverb
oval	Yes	Yes	No	No
ovate	No	Yes	No	No

As adjectives, oval and ovate are synonyms defined as:

Other synonyms of oval include egg-shaped, elliptic, elliptical, oval-shaped, oviform, ovoid, prolate.

oval (noun)	ovate (noun)
a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it

oval (adjective)	ovate (adjective)
rounded like an egg	rounded like an egg
	of a leaf shape; egg-shaped with the broader end at the base