sum vs defalcation

sum and defalcation both are nouns.

Word	Noun	Adjective	Verb	Adverb
sum	Yes	No	Yes	No
defalcation	Yes	No	No	No

As nouns, defalcation is a hyponym of sum; that is, defalcation is a word with a more specific, narrower meaning than sum:

sum (noun)	defalcation (noun)
the whole amount	the fraudulent appropriation of funds or property entrusted to your care but actually owned by someone else
the choicest or most essential or most vital part of some idea or experience	the sum of money that is misappropriated
a quantity obtained by the addition of a group of numbers
the final aggregate
a set containing all and only the members of two or more given sets
a quantity of money

sum (verb)	defalcation (verb)
determine the sum of
be a summary of