How to spell TIGHENED correctly?

The correct spelling of the word is "tightened". Some possible correct suggestions for misspellings include "tigtened", "tightend" or "tighttned". However, the best way to ensure correct spelling is to check a dictionary or use a spell-check tool.

• tightened The screw was tightened until it was securely in place.
• toughened The glass was toughened to withstand high temperatures.

Putrefication

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