有冇teethache呢個字?

teethache是沒有的,只有toothache
toothache
n.
1. 牙痛[U][C]
My wisdom teeth gave me a bad toothache. I decided to have them pulled.
我感覺我的智牙很痛。我決定把它們拔了。
My father had been suffering from a toothache before my last visit.
我上次去看父親前他一直牙痛。

no, just like headache not headsache

在字典及百科全書中都找不到Teethache這個字。
但在某些網站中卻找到teethache這個字。牙痛為甚麼用toothache而不用teethache也許是約定俗成吧，等如步行用on foot，人家也知道你不是只用一條腿走路吧。

Toothache
teeth is singular

It is called Toothach...
Not TEETHACH...
Understand?

冇!只有toothache呢個字，明冇?

teethache係冇呢個字