simple vs ovate

simple is a noun but ovate is not a noun.

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

simple (noun)	ovate (noun)
a person lacking intelligence or common sense
any herbaceous plant having medicinal properties

simple (adjective)	ovate (adjective)
(botany) of leaf shapes; of leaves having no divisions or subdivisions	rounded like an egg
having few parts; not complex or complicated or involved	of a leaf shape; egg-shaped with the broader end at the base
easy and not involved or complicated
exhibiting childlike simplicity and credulity
unornamented
lacking mental capacity and subtlety
apart from anything else; without additions or modifications