The 'ch' can be spelled 'ch,' 'tch,' and 't+u'.
 

1. ch

a. chip /ʧɪp/

 
 

b. teacher /'tiʧ ɚ/

 
 

c. rich /rɪʧ/

 
 

The 'ch' spelling can also be used to spell the 'sh sound' /ʃ/ (as in 'chef') or the /k/ (as in 'chorus').

2. tch

a. kitchen /ikɪʧ n̩/

 
 

b. itch /ɪʧ/

 
 

c. watch /wɑʧ/

 
 

3. t(+u)

a. virtue /'vɚ ʧu/

 
 

b. century /'sɛn ʧɚ i/

 
 

c. spatula /'spæ ʧə lə/

 
 

While the t+u spelling is preceded by the letter 's' or begins a stressed or secondarily stressed syllable, the /t/ is the more common pronunciation (as in the words 'study' and 'solitude').