fundamentally vs fundamental

fundamentally is not a noun while fundamental is a noun.

Word	Noun	Adjective	Verb	Adverb
fundamentally	No	No	No	Yes
fundamental	Yes	Yes	No	No

fundamentally (noun)	fundamental (noun)
	the lowest tone of a harmonic series
	any factor that could be considered important to the understanding of a particular business

fundamentally (adjective)	fundamental (adjective)
	being or involving basic facts or principles
	serving as an essential component
	far-reaching and thoroughgoing in effect especially on the nature of something

fundamentally (adverb)	fundamental (adverb)
in essence; at bottom or by one's (or its) very nature