Synonyms of duper

1 Syllable
dupe, twin, like
2 Syllables
xerox, coequal, very, clone, double, equal, carbon, ditto
3 Syllables
similar, related, selfsame, tantamount
4 Syllables
aforesaid, corresponding, carbon-copy, similarly, synonymous, compatible, equivalent, look-alike, comparable, likewise, duplicate
5 Syllables
interchangeable
6 Syllables
aforementioned, indistinguishable