From a primary (but obsolete) ergo (to work); toil (as an effort or occupation); by implication, an act -- deed, doing, labour, work.

ἔργα (erga) − 58 Occurrences

ἔργοις (ergois) − 13 Occurrences

ἔργον (ergon) − 38 Occurrences

ἔργου (ergou) − 8 Occurrences

ἔργῳ (ergō) − 10 Occurrences

ἔργων (ergōn) − 42 Occurrences