The word eaches does not technically exist in the English lexicon.
The word most closely resembling eaches is each.
Here's a list of synonyms for each.
Each and every
“We will give a toy to each child to play with.”
No matter what
Each of two
As the share of each
“I divided the samples into four groups of about ten each.”
Individually in succession
“I dealt with the cases each according to priority.”
In a careless or haphazard way
“Each will be judged and treated on a case-by-case basis.”
Every one of two or more people or things considered individually
“Each book is beautifully illustrated.”
Belonging or relating separately to each of two or more people or things
By means of
(a throw) Used to indicate how much a single item, turn, or attempt costs