How to spell DEFFUSION correctly?

If you're looking for the correct spelling of "deffusion", it is most likely a misspelling of "diffusion". Diffusion refers to the process of spreading or scattering. Other possible suggestions could be "defusion" or "disfusion", although these terms might not convey the precise meaning intended.

• delusion Believing that you can win the lottery every week is a delusion.
• diffusion The process of diffusion allows molecules to move from an area of high concentration to an area of low concentration.
• effusion The effusion of emotions during the wedding ceremony made everyone teary-eyed.

Excatally

• exact
• exacted
• exactingly
• exactly
• exacts
• executable
• exotically
• extol
• inexactly
• oxtail