Collocations for false - adj.

be, look, prove, sound

absolutely, completely, entirely, quite, totally, utterly
The gossip about her later proved to be entirely false.

simply
This claim is simply false.

certainly
blatantly, clearly, demonstrably, obviously, patently
Their claim was patently false.

knowingly
The law can punish knowingly false statements.

true or false
Lagos is the capital of Nigeria. True or false?

be, ring, sound
Ella's enthusiasm rang false.

very
slightly
Helen's voice sounded slightly false.

False is used with these nouns:
accusation, address, alarm, alibi, allegation, analogy, arrest, assertion, assumption, beard, belief, bottom, bravado, ceiling, charge, claim, conclusion, confession, confidence, consciousness, dawn, distinction, doctrine, document, economy, evidence, expectation, eyelash, front, god, hope, idea, identity, idol, illusion, image, impression, imprisonment, information, innocence, interpretation, invoice, lead, memory, modesty, moustache, move, nail, name, nose, note, notion, optimism, passport, perception, picture, prediction, presumption, pretext, promise, prophecy, prophet, reading, reassurance, religion, report, representation, rumour, sincerity, start, statement, step, story, suspicion, testimony, tooth, trail