dissertation vs thesis

dissertation and thesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
dissertation	Yes	No	No	No
thesis	Yes	No	No	No

As nouns, dissertation and thesis are synonyms defined as:

dissertation and thesis: a treatise advancing a new point of view resulting from research; usually a requirement for an advanced academic degree

dissertation (noun)	thesis (noun)
a treatise advancing a new point of view resulting from research; usually a requirement for an advanced academic degree	an unproved statement put forward as a premise in an argument
	a treatise advancing a new point of view resulting from research; usually a requirement for an advanced academic degree