coll - cond
- collagen
- collapse
- collapse basin
- collapse caldera
- collapse doline
- collapse lake
- collapse structure
- collar
- collateral
- collecting area
- collecting drain
- collection
- collective diagram
- collective flotation
- collector
- collector well
- collieite
- colliery
- collinite
- collinsite
- collision
- collision theory
- collision zone
- collobrierite
- colloform
- colloform structure
- colloid
- colloidal clay
- colloidal complex
- colloidal electrolyte
- colloidal humus
- colloidal particle
- colloidal science
- colloidal solution
- colloidal state
- colloidal system
- collophane
- collophanite
- colluvial deposit
- colluvial slope
