1) Affirmation 2) Assertion 3) Averment 4) Avouchment 5) Avowal 6) Claim 7) Contention 8) Ipsedixitism 9) Stating 1) An emphatic assertion 2) Assertion 3) Averment 4) Declaration 5) The act of asseverating 
positive or earnest affirmation
• (n.) The act of asseverating, or that which is asseverated; positive affirmation or assertion; solemn declaration.
As·sev`er·a'tion noun [ Latin asseveratio .] The act of asseverating, or that which is asseverated; positive affirmation or assertion; solemn declaration. « Another abuse of the tongue I might add, -- vehement asseverations upon slight and trivial occasions. Ray. » 
the act of asseverating. · an emphatic assertion.