simulation vs mannerism

simulation and mannerism both are nouns.

Word	Noun	Adjective	Verb	Adverb
simulation	Yes	No	No	No
mannerism	Yes	No	No	No

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

Other hyponyms of simulation include appearance, show, make-believe, pretend, affectation, affectedness, pose, charade, masquerade.

simulation (noun)	mannerism (noun)
the act of giving a false appearance	a deliberate pretense or exaggerated display
the act of imitating the behavior of some situation or some process by means of something suitably analogous (especially for the purpose of study or personnel training)	a behavioral attribute that is distinctive and peculiar to an individual
representation of something (sometimes on a smaller scale)
(computer science) the technique of representing the real world by a computer program