dynamical vs dynamic

dynamical is not a noun while dynamic is a noun.

Word	Noun	Adjective	Verb	Adverb
dynamical	No	Yes	No	No
dynamic	Yes	Yes	No	No

As adjectives, dynamical and dynamic are synonyms defined as:

dynamical and dynamic: characterized by action or forcefulness or force of personality

dynamical (noun)	dynamic (noun)
	an efficient incentive

dynamical (adjective)	dynamic (adjective)
characterized by action or forcefulness or force of personality	characterized by action or forcefulness or force of personality
	(used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water')) expressing action rather than a state of being
	of or relating to dynamics