Incorrect spelling, explanation: this word is a misspelling. There is no reason to write it like that. When we look at its etymology, we can clearly see that both noun and verb need to be spelled with two -a vowels. Therefore, the only correct form is warrant, not warrent.

Correct spelling, explanation: warrant is not only a noun but also a verb. It originates from the Old North French and Frankish languages. Its previous forms were warant, warand, and warantir. Before spelling a word, one should always look at its etymology. Warrent is clearly a mistake and the only correct form is warrant.

Definition of warrant:
1. noun, a writing or document certifying or authorizing something
The judge issued an arrest warrant for the thief.
Police received a warrant to search her house.
2. verb, to give authority to
Your company must warrant this contract.