General nouns
Using something for a practical purpose
a. application
b. design
c. replacement
Application
Bring together/combine
a. mix
b. unite
c. unify
Unify
Process of appearing or starting to exist
a. divergence
b. insurgence
c. emergence
Emergence
Carefully controlled set of actions
a. action/method
b. phase/step/stage
c. process/duration/development
Phase/Step/Stage
Make certain that something is correct
a. check
b. analyze
c. verify
Verify
Arrival of an invention (the noun has no verb form)
a. introduction
b. advent
c. arrival
Advent
A model of a problem or course of events
a. example
b. simulation
c. fiction
Simulation
Add something to something to make it larger or better
a. add
b. supplement
c. embed
Supplement (verb)
Process of making an agreement official
a. ratification
b. verification
c. officialization
Ratification