tenacious

As an adjective tenacious

is clinging to an object or surface; adhesive.

As a noun courage is

courage.

As adjectives the difference between vivacious and tenacious

is that vivacious is lively and animated; full of life and energy while tenacious is clinging to an object or surface; adhesive.

As an adjective tenacious

is clinging to an object or surface; adhesive.

As a noun homebody is

a person who prefers to remain at home, rather than participate in social events elsewhere.

As a noun dedication

is the act of dedicating or the state of being dedicated.

As an adjective tenacious is

clinging to an object or surface; adhesive.

As adjectives the difference between tenacious and null

is that tenacious is clinging to an object or surface; adhesive while null is having no validity, "null and void.

As a noun null is

a non-existent or empty value or set of values.

As a verb null is

to nullify; to annul.