How to spell ASCERTIAN correctly?

If you find yourself misspelling "ascertian", don't worry! The correct spelling of this word is "ascertain". To avoid making the same mistake in the future, practice looking out for the double 'i' and 'a' in the correct spelling.

• ascertain I need to ascertain the exact time of your arrival so that we can plan accordingly.
• assertion I do not agree with your assertion about global warming.

Putrefication

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