ovoid vs oval

ovoid and oval both are nouns.

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

As adjectives, ovoid and oval are synonyms defined as:

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

ovoid (noun)	oval (noun)
an egg-shaped object	a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it

ovoid (adjective)	oval (adjective)
rounded like an egg	rounded like an egg