disjunctive
secondary
unconventional
additional
agent
alternate
alternate choice
analogy
another
attainable
backup
change
changeling
choice
comparison
contingency
copy
counterfeit
deputy
different
discretion
discretional
disjunction
double
druthers
dummy
election
elective
equal
equivalent
ersatz
escape clause
escape hatch
exchange
exchangeable
fake
fill-in
ghost
ghostwriter
horn
imitation
interchangeable
locum tenens
loophole
makeshift
metaphor
metonymy
mock
next best thing
alternatives
alternativeness
alternativism
global
investment
objective
option
software
specific
standard
strategy
target