fundamentally vs essentially

fundamentally and essentially both are adverbs.

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

As adverbs, fundamentally and essentially are synonyms defined as:

fundamentally and essentially: in essence; at bottom or by one's (or its) very nature

Other synonyms of fundamentally include basically.

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