adjective + (n.)fiat administrative, bureaucratic, divine, dry, governmental, judicial, just, key, legislative, managed, pure, red, regulatory, thin, wide

verb + (n.)fiat impose, lay, lie, render, rule

(n.)fiat + verb back, manage, market, tire

noun + (n.)fiat block, creation, executive, faith, foot, gold, government, mile, signature, tone, wheel