summation vs collection

summation and collection both are nouns.

Word	Noun	Adjective	Verb	Adverb
summation	Yes	No	No	No
collection	Yes	No	No	No

As nouns, collection is a hypernym of summation; that is, collection is a word with a broader meaning than summation:

Other hypernyms of summation include accumulation, aggregation, assemblage.

summation (noun)	collection (noun)
the arithmetic operation of summing; calculating the sum of two or more numbers	the act of gathering something together
a concluding summary (as in presenting a case before a law court)	a publication containing a variety of works
the final aggregate	request for a sum of money
(physiology) the process whereby multiple stimuli can produce a response (in a muscle or nerve or other part) that one stimulus alone does not produce	several things grouped together or considered as a whole