intromission (n.)
- acceptance
- admission
- admittance
- baptism
- enlistment
- enrollment
- entrance
- graft
- grafting
- impaction
- implantation
- inauguration
- induction
- infusion
- initiation
- injection
- inoculation
- insertion
- insinuation
- installation
- instatement
- interjection
- interpolation
- introduction
- investiture
- ordination
- penetration
- perfusion
- tessellation
- transplant
- transplantation
