to succeed --> success
to progress --> progress
to revise --> revision
to know --> knowledge
to articulate --> articulateness
to sound --> sound
to discuss --> discussion
to advise --> advice
to work --> work
to pronounce --> pronunciation
to divide --> division
to study --> study
to think --> thought
to speak --> speech
to differ --> difference
to practice --> practice
to improve --> improvement
to understand --> understanding
to equip --> equipment
to supply --> supplement
