Collocations for bold - adj.

be, feel
become, grow
make sb
The exciting news had made him bold.

extremely, fairly, very, etc.

Bold is used with these nouns:
assertion, attempt, claim, colour, declaration, design, experiment, front, gamble, gesture, hypothesis, initiative, leap, letter, look, move, prediction, print, proclamation, proposal, relief, splash, statement, step, stripe, stroke, type, venture, vision, word