This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Present participle of assert.

adj. declaring.

adj. relating to the use of or having the nature of a declaration

"Scott is correct in asserting that "a lot of trial and error is involved in the writing of most novels," and for that very reason "trial and error" is not really very helpful in capturing what literary critics/scholars have meant by using "experimental fiction" in describing selected works of fiction, especially fiction written since 1945, "experimental.""

declaratory    declaring   

assert   

alerting    averting    converting    disconcerting    diverting    exerting    flirting    hurting    inserting    perverting