We don't have synonyms for negations yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are negation, legation and relations.
(n) :
(uncountable) The act of negating something.
(n) :
(countable) A denial or contradiction.
(n) :
(logic, countable) A proposition which is the contradictory of another proposition and which can be obtained from that other proposition by the appropriately placed addition/insertion of the word "not". (Or, in symbolic logic, by prepending that proposition with the symbol for the logical operator "not".)
(n) :
(logic) The logical operation which obtains such (negated) propositions.
(n) :
(uncountable) The act of negating something.
(n) :
(countable) A denial or contradiction.
(n) :
(logic, countable) A proposition which is the contradictory of another proposition and which can be obtained from that other proposition by the appropriately placed addition/insertion of the word "not". (Or, in symbolic logic, by prepending that proposition with the symbol for the logical operator "not".)
(n) :
(logic) The logical operation which obtains such (negated) propositions.