duplicate (n.)
- alike
- binary
- binate
- carbon
- clone
- companion
- copy
- copying
- correspondent
- counterpart
- ditto
- double
- doubling
- dual
- dupe
- duplex
- duplication
- echo
- effigy
- equal
- equivalent
- facsimile
- fellow
- geminate
- gemination
- hectograph
- homograph
- homonym
- homophone
- icon
- idol
- image
- imitation
- iteration
- like
- likeness
- manifold
- match
- matching
- mate
- microfilm
- mimeo
- mimeograph
- miniature
- model
- one
- parallel
- parrot
- photocopy
- photograph
- picture
- portrait
- quadruplicate
- quote
- redo
- reduplication
- reflection
- reissue
- reiteration
- remake
- repeat
- repetition
- replica
- replication
- representation
- reprint
- reproduction
- resemblance
- revise
- rubbing
- same
- second
- secondary
- semblance
- shadow
- similitude
- simulacrum
- stat
- synonym
- trace
- tracing
- triplicate
- twin
duplicate (v.)
- binate
- clone
- companion
- copy
- ditto
- double
- dupe
- duplex
- echo
- equal
- facsimile
- geminate
- hectograph
- image
- imitate
- ingeminate
- like
- manifold
- match
- mate
- microcopy
- microfilm
- mimeo
- mimeograph
- model
- one
- parallel
- parrot
- photocopy
- photograph
- picture
- plagiarize
- quadruplicate
- quote
- re-create
- rebuild
- reconstitute
- reconstruct
- redesign
- redo
- redouble
- reduplicate
- reecho
- reestablish
- refashion
- regenerate
- regurgitate
- reincarnate
- reissue
- remake
- renew
- renovate
- reorganize
- repeat
- replicate
- reprint
- reproduce
- reshape
- restore
- restructure
- resurrect
- revise
- revive
- second
- shadow
- stat
- trace
- transcribe
- triplicate
- twin
duplicate (adj.)
- alike
- ambidextrous
- analogous
- bifacial
- biform
- bilateral
- binary
- binate
- biparous
- bivalent
- comparable
- consubstantial
- correspondent
- corresponding
- double
- double-faced
- dual
- duple
- duplex
- equal
- equivalent
- fellow
- identical
- imitation
- indistinguishable
- like
- manifold
- matching
- mate
- miniature
- model
- one
- parallel
- quadruplicate
- regenerate
- reincarnate
- same
- second
- secondary
- selfsame
- tantamount
- twin
- twinned
- twinning
- two-faced
- two-ply
- two-sided
- twofold
