What's the difference between assert and asseverative?

Assert

Definition:

(v. t.) To affirm; to declare with assurance, or plainly and strongly; to state positively; to aver; to asseverate.
(v. t.) To maintain; to defend.
(v. t.) To maintain or defend, as a cause or a claim, by words or measures; to vindicate a claim or title to; as, to assert our rights and liberties.

Example Sentences:

(1) Parents believed they should try to normalize their child's experiences, that interactions with health care professionals required negotiation and assertiveness, and that they needed some support person(s) outside of the family.
(2) Jeremy Corbyn could learn a lot from Ken Livingstone | Hugh Muir Read more High-minded commentators will say that self-respect – as well as Burke’s dictum that MPs are more than delegates – should be enough to make members under pressure assert their independence.
(3) There are many examples to support his assertion, yet for the most part, it is celebrities who dictate what images can be published and what stories should be told.
(4) Neither assertion was strictly accurate, but Obama was on a rhetorical roll.
(5) Successful treatment also requires the use of assertive case management, community support, family support, and careful patient education.
(6) The UN-recognised parliament is expected to meet on Monday for a vital vote of confidence in the new administration, the next step in asserting its authority in the country.
(7) Fields said: "The assertions that Tom Cruise likened making a movie to being at war in Afghanistan is a gross distortion of the record... What Tom said, laughingly, was that sometimes, 'That's what it feels like.'"
(8) Is it a moment where culture needs to assert its values?
(9) She described Luke as being “open, honest and assertive” during the interview.
(10) Individuals in the middle received relatively large amounts of assertive behavior.
(11) No differences were observed on the behavioral role plays, which required assertion in a number of heterosexual situations.
(12) Bill Shorten has told the union royal commission he would “never be a party to issuing bogus invoices” as he rejected assertions that payments from employers to the Australia Workers’ Union created conflicts of interest during wage negotiations.
(13) Hawking's latest comments go beyond those laid out in his 2010 book, The Grand Design , in which he asserted that there is no need for a creator to explain the existence of the universe.
(14) Sitting on his stony porch, Rao asserts that he is not being romantic about the benefits of agriculture: “Here we earn more than 120,000 rupees [£1,170] a year, and our cost of living is one-fifth that of a city’s.
(15) But Clegg also says he is not going to be cowed into taking Cameron's vow of silence about Farage's assertion that he finds Britain unrecognisable and is uncomfortable at the lack of English spoken on commuter trains out of Charing Cross.
(16) We assert that OCD and AVN are relatively common, clinically significant lesions of the mandibular condyle often associated with preexisting internal derangement of the temporomandibular joint.
(17) On the basis of the results of the research the Authors conclude by asserting that the combined use of mannitol and propanol has a real protective effect in preventing or attenuating lesions of the kidney caused by serious acute renal failure.
(18) Grade said he objected to Dyke's assertion in the Times that he used information about the BBC's schedule when he quit as chairman of the corporation in late 2006 to move to ITV.
(19) The ethnomedical model asserts that efforts to secure the compliance of target populations are likely to be inadequate without an alliance between health professionals and communities to identify and address mutually comprehensible objectives that are perceived locally as meaningful and relevant.
(20) Moreover, the heterogeneity of ES components questions the assertion of previous workers that the allergenic, IgE-potentiating, and protective activities of larval ES can be ascribed to one molecular species.