Decoding exercises: "th"

The digraph "th" very reliably is pronounced either /θ/ or /ð/. See Pronunciation exercises: vs.

This page shows the exceptions.

Silent "h"

 * "th" as /t/: Anthony - Esther - Neanderthal /niˈændərtɑːl/ - Thailand /ˈtaɪlænd/ - Thames /tmz/ - Theresa - Thomas - Thompson - thyme
 * posthumous /ˈpɒstjʊməs, ˈpɒstʃəməs/

/t.h/
/t/ and /h/ are sound separately in compound words
 * anthill - lighthouse - masthead

Spelling anomalies

 * /tθ/: eighth /eɪtθ, eɪθ/

Variant pronunciations

 * clothes /kləʊðz, kləʊz /