activity vs dynamism

activity and dynamism both are nouns.

Word	Noun	Adjective	Verb	Adverb
activity	Yes	No	No	No
dynamism	Yes	No	No	No

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

activity: the trait of being active; moving or acting rapidly and energetically
dynamism: the activeness of an energetic personality

Other hyponyms of activity include animation, brio, invigoration, spiritedness, vivification, oomph, pizzaz, pizzazz, zing.

activity (noun)	dynamism (noun)
any specific behavior	the activeness of an energetic personality
the trait of being active; moving or acting rapidly and energetically	active strength of body or mind
an organic process that takes place in the body	any of the various theories or doctrines or philosophical systems that attempt to explain the phenomena of the universe in terms of some immanent force or energy
a process existing in or produced by nature (rather than by the intent of human beings)
the state of being active
(chemistry) the capacity of a substance to take part in a chemical reaction