Following are all the back-up like words, in the list below.
BACKUP
100% like back-up
DROP-IN
99.99% like back-up
SAFEGUARD
99.94% like back-up
SAFEGUARDING
99.93% like back-up
PROTECTION
99.93% like back-up
PROTECTIVE
99.93% like back-up
SURGE
99.93% like back-up
BOOSTER
99.91% like back-up
BACK
99.9% like back-up
AUGMENTATION
99.89% like back-up
REVERSING
99.89% like back-up
PRESERVATION
99.89% like back-up
REVERSE
99.89% like back-up
LIEU
99.88% like back-up
SAUVEGARDE
99.86% like back-up
STAND-BY
99.86% like back-up
FALL-BACK
99.86% like back-up
SAVING
99.85% like back-up
SEATBACK
99.85% like back-up
RESCUE
99.85% like back-up
REINFORCEMENT
99.85% like back-up
SUCCOUR
99.85% like back-up
REINFORCING
99.85% like back-up
FALLBACK
99.84% like back-up
BACKREST
99.84% like back-up
ALTERNATE
99.84% like back-up
RESERVE
99.84% like back-up
REFRESHER
99.83% like back-up
HELP
99.83% like back-up
ASSISTANT
99.83% like back-up
AID
99.83% like back-up
LOGISTICS
99.83% like back-up
REPLACEMENT
99.83% like back-up
ASSISTANCE
99.83% like back-up
SUPPORT
99.82% like back-up
AUXILIARY
99.82% like back-up
BACKING
99.82% like back-up
SUBSTITUTE
99.82% like back-up
COPY
99.82% like back-up
LOCUM
99.82% like back-up
EMERGENCY
99.81% like back-up
SUPPLEMENTARY
99.81% like back-up
ESCAPE
99.81% like back-up
ADDITIONAL
99.81% like back-up
ANCILLARY
99.81% like back-up
SUBSIDIARY
99.81% like back-up
SUPPLEMENTAL
99.81% like back-up
ACCOMPANYING
99.81% like back-up
SUPPORTING
99.81% like back-up
BOOKING
99.79% like back-up
SUPPORTIVE
99.79% like back-up
STIFFENER
99.78% like back-up
COMPLEMENTARY
99.77% like back-up
SUB
99.77% like back-up
ADJUNCT
99.77% like back-up
RESPITE
99.76% like back-up
SALVAGE
99.76% like back-up
COMPANION
99.75% like back-up
RELIEF
99.74% like back-up
SUCCESSION
99.73% like back-up
MAKE-UP
99.73% like back-up
STANDBY
99.73% like back-up
SECONDARY
99.72% like back-up
ADJUNCTIVE
99.71% like back-up
ENDORSEMENT
99.7% like back-up
JUNIOR
99.69% like back-up
ALTERNATIVE
99.69% like back-up
CONTINGENCY
99.63% like back-up
LOGISTICAL
99.63% like back-up
LOGISTIC
99.61% like back-up
STIFFENING
99.61% like back-up
FEEDER
99.59% like back-up
SPARE
99.56% like back-up
SECURITY
99.55% like back-up
RESERVATION
99.35% like back-up
ACCOMPANIMENT
99.32% like back-up
AUXILIARIES
50.05% like back-up
BACKSTOPPING
50.05% like back-up
BACKUPS
50.05% like back-up
SAFEGUARDS
50.05% like back-up
BACK-ASSWARD
50.05% like back-up
BACKASSWARDS
50.05% like back-up
UPSIDEDOWN
50.05% like back-up
BEHIND-THE-SCENES
50.05% like back-up
ON-HAND
50.05% like back-up
STOP-GAP
50.05% like back-up
PIGGY-BACK
50.05% like back-up
BASSACKWARDS
50.05% like back-up
OFF-GUARD
50.05% like back-up
SWAY-BACKED
50.05% like back-up
LEAD-OFF
50.05% like back-up
FRONT-LINE
50.05% like back-up
BACKASSWARD
50.05% like back-up
BELLY-UP
50.05% like back-up
CAST-OFF
50.05% like back-up
EN-SUITE
50.05% like back-up
BACK-STABBING
50.05% like back-up
BACK-STABBY
50.05% like back-up
SHUT-UP
50.05% like back-up
PULL-OUT
50.05% like back-up
