1) Aggressive self-assurance 2) Forceful confidence 3) Human behavior 4) Positiveness 5) Self-assertiveness 1) Bumptiousness 2) Cockiness 3) Fierceness 4) Forwardness 5) Insistence 6) Pushiness 
Assertiveness is the quality of being self-assured and confident without being aggressive. In the field of psychology and psychotherapy, it is a learnable skill and mode of communication. Dorland`s Medical Dictionary defines assertiveness as: `a form of behavior characterized by a confident declaration or affirmation of a statement without need .....
Strongly insistent, self-assured, and demanding behaviour. ... (12 Dec 1998) ... 
(ә-sur´tiv-nes) a form of behavior characterized by a confident declaration or affirmation of a statement without need of proof; this affirms the person's rights or point of view without either aggressively threatening the rights of another (assuming a position of dominance) or submissively permitting anothe...
[n] - aggressive self-assurance
assertiveness 1. Strongly insistent, self-assured, and demanding behavior. 2. Aggressive self-assurance; given to making bold assertions.
self-assertiveness noun aggressive self-assurance; given to making bold assertions