Consonant Sound Pair
Voiceless /Θ/ & Voiced /ð/

Nursery Rhyme
Three Wise Men of Gotham

Over the River & Through the Woods

thorough ... though ... thought ... through

Sound Pairs
/f - Θ/ & /v - ð/
/s - Θ/ & /z - ð/
/sh - Θ/ & /dzh - ð/
/t - Θ/ & /d - ð/

Arabic: /t-d/
Chinese: /t-d/ & /s-z/ & /f - Θ/
French: /s-z/
Japanese /s-z/ & /sh-ʤh/
Polish, Russian: /s-z/
Spanish: /f - Θ/ & /t-d/
Vietnamese: /t-d/ & /s-z/