If you meant to type "tahch" but spelled it incorrectly, several suggestions might come to mind. The correct spelling for the word you might be referring to could be "catch", "patch" or "teach". Make sure to proofread your text to avoid such errors.
ACH Although he is a skilled musician, he still struggles to hit the high ACH on the trumpet.
ACh "ACh stands for acetylcholine, a neurotransmitter that plays a crucial role in various bodily functions, including muscle movement and memory formation."