As nouns the difference between imbursement and disbursement
is that imbursement is the act of imbursing, or the state of being imbursed while disbursement is the act, instance, or process of disbursing.
imbursement
English
Noun
(obsolete) The act of imbursing, or the state of being imbursed.
(obsolete) Money laid up in stock.
(
Webster 1913)
disbursement
English
Noun
(
en noun)
The act, instance, or process of disbursing.
Money paid out or spent.