As nouns the difference between terms and dation
is that terms is while dation is (rare|legal) the act of giving, granting or conferring (eg an office) but not liberal as a donation or gift.
terms
English
Noun
(head)
Statistics
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dation
English
Noun
(
en noun)
(rare, legal) The act of giving, granting or conferring (e.g. an office) but not liberal as a donation or gift
(obsolete, medicine) A dose
Derived terms
* dation in payment
References
*OED 2nd edition.