dynamic

(noun) an efficient incentive. Synonyms: moral force. Example: "They hoped it would act as a spiritual dynamic on all churches."

(adj) characterized by action or forcefulness or force of personality. Synonyms: dynamic (vs. undynamic), dynamical. Examples: "A dynamic market." "A dynamic speaker." "The dynamic president of the firm."

(adj) of or relating to dynamics.

(adj) (used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water')) expressing action rather than a state of being. Synonyms: active (vs. stative).