As a noun ach
is a name given to several species of plants; as, smallage, wild celery, parsley.
As a proper noun ACH
is initialism of
Automated Clearing House|lang=en, an electronic banking network often used for direct deposit and electronic bill payment.
As an adjective achy is
suffering from aches, sore.
ach
English
Alternative forms
* ache
Noun
(
en noun)
(obsolete) A name given to several species of plants; as, smallage, wild celery, parsley.
achy
English
Adjective
(er)
Suffering from aches, sore.