synthesis vs deductive reasoning

synthesis and deductive reasoning both are nouns.

Word	Noun	Adjective	Verb	Adverb
synthesis	Yes	No	No	No
deductive reasoning	Yes	No	No	No

As nouns, synthesis and deductive reasoning are synonyms defined as:

synthesis and deductive reasoning: reasoning from the general to the particular (or from cause to effect)

Other synonyms of synthesis include deduction.

synthesis (noun)	deductive reasoning (noun)
the combination of ideas into a complex whole	reasoning from the general to the particular (or from cause to effect)
reasoning from the general to the particular (or from cause to effect)
the process of producing a chemical compound (usually by the union of simpler chemical compounds)