tenacious

As adjectives the difference between trustworthy and tenacious

is that trustworthy is deserving of trust, reliable 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 audacity is

insolent boldness, especially when imprudent or unconventional.

As adjectives the difference between tenacious and false

is that tenacious is clinging to an object or surface; adhesive while false is (label) one of two states of a boolean variable; logic.

As adjectives the difference between tenacious and undefined

is that tenacious is clinging to an object or surface; adhesive while undefined is lacking a definition or value.

As an adjective tenacious

is clinging to an object or surface; adhesive.

As a noun courage is

courage.