How to spell FAOUL correctly?

Possible correct suggestions for the misspelling "faoul" would be "foul", "fowl" or "fall". If the context is a sports game or a court ruling, "foul" would be the most appropriate spelling. If referring to a bird, "fowl" would be correct. If referring to a season, "fall" would be the correct spelling.

• afoul I found her car afoul of the law.
• fail
• fall I enjoyed the fall festival.
• foil I used aluminum foil to wrap up the leftovers from dinner.
• fool No one ever stands up to a fool.
• foul I found a foul odor coming from his car.

Putrefication

• nitrification
• petrifaction
• purification
• putrefaction
• putrification
• vitrification