replacement (n.)

• agency
• agent
• alternate
• alternative
• analogy
• backup
• change
• changeling
• commutation
• comparison
• copy
• counterfeit
• delegation
• deputation
• deputy
• descendant
• displacement
• double
• dummy
• equal
• equivalent
• ersatz
• exchange
• fake
• fill-in
• ghost
• ghostwriter
• heir
• imitation
• improvement
• inheritor
• instauration
• locum
• makeshift
• metaphor
• metonymy
• personnel
• phony
• posterity
• proxy
• reenactment
• reformation
• rehabilitation
• reinstatement
• relief
• representation
• representative
• reserves
• restitution
• restoration
• reversion
• ringer
• secondary
• sign
• stand-in
• sub
• subrogation
• substitute
• substitution
• succedaneum
• successor
• supersedure
• supersession
• supplanter
• supplanting
• surrogate
• switch
• symbol
• synecdoche
• token
• understudy
• vicar
• vice-regent