Example : Audacious explorers.
Fearless reporters and photographers.
Intrepid pioneers.

Synonyms : brave, dauntless, fearless, hardy, intrepid, unfearing

Example : An audacious trick to pull.
A barefaced hypocrite.
The most bodacious display of tourism this side of Anaheim.
Bald-faced lies.
Brazen arrogance.
The modern world with its quick material successes and insolent belief in the boundless possibilities of progress.

Synonyms : bald-faced, barefaced, bodacious, brassy, brazen, brazen-faced, insolent

Example : Audacious visions of the total conquest of space.
An audacious interpretation of two Jacobean dramas.
The most daring of contemporary fiction writers.
A venturesome investor.
A venturous spirit.

Synonyms : daring, venturesome, venturous