ISS(Identical Screening Search)で発音同一として見なされるルールの一覧です。
| 相違音 | 検索例 |
| Y = I | PYROS = PIROS |
| EAU = O | BEAUTY = BOTI |
| AU = O | AUVAL = OVAL |
| PH = F | PHARMA = FARMA |
| Z = S | ZORBA = SORBA |
| CH = Z | CHARO = ZARO |
| SCHWEPPES = SZWEPES | |
| SH = Z | SHINTO = ZINTO |
| CE = SE | SOURCE = SOURSE |
| CI = SI | CECILE = SESILE |
| C = K | ACAPULCO = AKAPULKO |
| ARLECCHINO = ARLEKZINO | |
| ACCIDENT = AKSIDENT | |
| QU = K | QUATTRO = KATRO |
| Q = K | QUATTRO = KUATRO |
| X = KS | MEXICO = MEKSIKO |
| && = & | LOCKAR = LOKAR |
| PILLER = PILER(2 Identical letters become 1) | |
| H = - | SAHARA = SAARA |
| HOMELESS = OMELES | |
| (H is dropped unless Trademark = 'H') | |
| B = P | BYROS = PIROS |
| D = T | DENTAL = TENTAL |
| BOULEDOR = POULETOR | |
| F = V | FAUNA = VON |
| W = V | WRANGLER = VRANGLER |
| WISTLER = VISTLER | |
| M = N | BAMIDOL = PANITOL |
| PREMAMAN = PRENANAN |