Common words:
* Decision
* Vision
* Mission
* Tension
* Revision
* Expansion
* Expression
* Discussion
* Conclusion
* Collision
* Ascension
* Profession
* Session
* Dimension
* Fusion
* Division
* Invasion
* Conversion
* Suspicion
* Occasion
Less common words:
* Accession
* Aspersion
* Concession
* Confession
* Deception
* Depression
* Digression
* Dispersion
* Eruption
* Erosion
* Explosion
* Extension
* Implosion
* Obsession
* Percussion
* Precision
* Regression
* Rescission
* Subversion
* Transgression
* Version
Words related to specific fields:
* Adhesion (biology, chemistry)
* Coalescence (chemistry, physics)
* Combustion (chemistry)
* Diffusion (physics, biology)
* Excision (surgery)
* Incubation (biology)
* Incision (surgery)
* Intrusion (geology)
* Protrusion (anatomy)
* Retraction (biology)
* Submersion (oceanography)
This is not an exhaustive list, but it provides a good starting point.