Synonyms of synonymous

1 Syllable
same, like
2 Syllables
duper, samer, equal, cloner
3 Syllables
similar, alike, coincident, selfsame, tantamount, fungible, identic
4 Syllables
corresponding, commutable, workalike, carbon-copy, compatible, synonymic, equivalent, identical, lookalike, identified, convertible, correspondent, coterminus, apposite
5 Syllables
substitutable, interchangeable
6 Syllables
interconvertible