analysis vs dissection

analysis and dissection both are nouns.

Word	Noun	Adjective	Verb	Adverb
analysis	Yes	No	No	No
dissection	Yes	No	No	No

As nouns, dissection is a hyponym of analysis; that is, dissection is a word with a more specific, narrower meaning than analysis:

analysis: an investigation of the component parts of a whole and their relations in making up the whole
dissection: detailed critical analysis or examination one part at a time (as of a literary work)

As nouns, dissection is a hyponym of analysis; that is, dissection is a word with a more specific, narrower meaning than analysis:

analysis: the abstract separation of a whole into its constituent parts in order to study the parts and their relations
dissection: a minute and critical analysis

analysis (noun)	dissection (noun)
an investigation of the component parts of a whole and their relations in making up the whole	cutting so as to separate into pieces
a set of techniques for exploring underlying motives and a method of treating various mental disorders; based on the theories of Sigmund Freud	detailed critical analysis or examination one part at a time (as of a literary work)
the abstract separation of a whole into its constituent parts in order to study the parts and their relations	a minute and critical analysis
a branch of mathematics involving calculus and the theory of limits; sequences and series and integration and differentiation
a form of literary criticism in which the structure of a piece of writing is analyzed
the use of closed-class words instead of inflections: e.g., `the father of the bride' instead of `the bride's father'