Ch and tch, k and ck

After one vowel, at the end of a word, we usually write -ck and -tch for the sounds /k/ and /tʃ/.

• back
• catch
• neck
• fetch
• sick
• stitch
• lock
• botch
• stuck
• hutch

Exceptions:

• yak
• tic
• public (and many other words ending in -ic)
• rich
• which
• such
• much
• attach
• detach

After a consonant or two vowels, we write -k and -ch.

• bank
• break
• work
• book
• talk
• week
• march
• peach
• bench
• coach