How to spell INSTEADA correctly?

If you meant to write "instead", then a possible suggestion for the misspelling "insteada" could be to simply remove the extra letter "a". Another suggestion could be to use a spell-check tool to catch similar mistakes in the future.

• instead They decided to go on a amusement park instead.
• unsteady The baby took a few unsteady steps before falling back down.

Putrefication

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