backup

synonyms

about-face

about-turn

accompaniment

advocate

agent

alter ego

alternate

alternative

amicus curiae

analogy

attorney

back track

back trail

backing

backing off

backing out

backing up

backup man

champion

change

changeling

comparison

copy

counterfeit

deputy

double

dummy

equal

equivalent

ersatz

exchange

executive officer

exponent

fake

figurehead

fill-in

ghost

ghostwriter

imitation

lieutenant

locum

locum tenens

makeshift

metaphor

metonymy

mock

next best thing

paranymph

personnel

phony

hypernyms

accretion

accumulation

approval

approving

blessing

duplicate

duplication

same-contexts

access

additional

audio

backups

built-in

default

digital

emergency

encryption

hardware

installation

monitor

recovery

storage

surveillance

tactical

update