replacing

Noun

• the act of furnishing an equivalent person or thing in the place of another
  • "replacing the star will not be easy"

Verb

• substitute a person or thing for (another that is broken or inefficient or lost or no longer working or yielding what is expected)
• take the place or move into the position of
• put something back where it belongs
• put in the place of another; switch seemingly equivalent items
• present participle and gerund of replace

Synonyms

exchange, interchange, put back, replace, replacement, substitute, supercede, supersede, supervene upon, supplant