substitute (n.)
- advocate
- agent
- alternate
- alternative
- analogy
- attorney
- backup
- champion
- change
- changeling
- commute
- comparison
- copy
- counterfeit
- delegate
- deputy
- double
- dummy
- equal
- equivalent
- ersatz
- exchange
- expediency
- expedient
- exponent
- extra
- fake
- figurehead
- fill-in
- ghost
- ghostwriter
- imitation
- lieutenant
- locum
- makeshift
- metaphor
- metonymy
- mock
- mute
- other
- personnel
- phony
- pinch
- pleader
- procurator
- proxy
- recourse
- refuge
- relay
- relief
- replace
- replacement
- representative
- reserve
- reserves
- resort
- ringer
- second
- secondary
- sham
- sign
- spare
- stand-in
- standby
- stopgap
- sub
- substitution
- succedaneum
- super
- supernumerary
- supplanter
- supply
- support
- surrogate
- swap
- switch
- symbol
- synecdoche
- temporary
- token
- trade
- understudy
- utility
- vicar
- vice
- vice-regent
- vicegerent
- walk-on
substitute (v.)
substitute (adj.)
- additional
- alternate
- alternative
- another
- champion
- change
- counterfeit
- double
- dummy
- equal
- equivalent
- ersatz
- expedient
- extra
- fake
- false
- imitation
- makeshift
- mock
- mute
- other
- personnel
- phony
- provisional
- representative
- second
- secondary
- sham
- sign
- simulated
- spare
- spurious
- standby
- super
- supernumerary
- supplemental
- supplementary
- support
- surrogate
- temporary
- tentative
- token
- utility
- vicarious
- vice
- walk-on
