dismantlement vs dismantling

dismantlement and dismantling both are nouns.

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

As nouns, dismantlement and dismantling are synonyms defined as:

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

Other synonyms of dismantlement include disassembly.

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