concoct
Meaning: to fabricate, make up
Usage: She concocted the most ridiculous story to explain her absence.
fabricate
Meaning: to make up, invent, or create falsely
Usage: Lena fabricated an excuse for why her homework was missing.
dissemble
Meaning: to conceal, fake
Usage: Not wanting to appear heartlessly greedy, she dissembled and hid her intention to sell her ailing father’s stamp collection.
debunk
Meaning: to expose the falseness of something
Usage: He debunked her claim to be the world’s greatest chess player by defeating her in 18 consecutive matches.