dismantlement vs disassembly

dismantlement and disassembly both are nouns.

Word	Noun	Adjective	Verb	Adverb
dismantlement	Yes	No	No	No
disassembly	Yes	No	No	No

As nouns, dismantlement and disassembly are synonyms defined as:

dismantlement and disassembly: the act of taking something apart (as a piece of machinery)

Other synonyms of dismantlement include dismantling.

dismantlement (noun)	disassembly (noun)
the act of taking something apart (as a piece of machinery)	the act of taking something apart (as a piece of machinery)