uncultivated vs lowbrow

uncultivated is not a noun while lowbrow is a noun.

Word	Noun	Adjective	Verb	Adverb
uncultivated	No	Yes	No	No
lowbrow	Yes	Yes	No	No

As adjectives, uncultivated and lowbrow are synonyms defined as:

uncultivated and lowbrow: characteristic of a person who is not cultivated or does not have intellectual tastes

Other synonyms of uncultivated include lowbrowed.

uncultivated (noun)	lowbrow (noun)
	a person who is uninterested in intellectual pursuits

uncultivated (adjective)	lowbrow (adjective)
(of land or fields) not prepared for raising crops	characteristic of a person who is not cultivated or does not have intellectual tastes
characteristic of a person who is not cultivated or does not have intellectual tastes
(of persons) lacking art or knowledge