| verb | state categorically |
| verb | to declare or affirm solemnly and formally as true “Before God I swear I am innocent” |
| verb | insist on having one's opinions and rights recognized “Women should assert themselves more!” |
| verb | assert to be true “The letter asserts a free society” |
| adjective | relating to the use of or having the nature of a declaration |
| assertable | adjective | capable of being affirmed or asserted |
| assertion | noun | a declaration that is made emphatically (as if no supporting evidence were necessary) |
| asseveration | noun | a declaration that is made emphatically (as if no supporting evidence were necessary) |
| asseverator | noun | someone who claims to speak the truth |
| affirmation | noun | the act of affirming or asserting or stating something |
| affirmer | noun | someone who claims to speak the truth |
| asserter | noun | someone who claims to speak the truth |
| avower | noun | someone who claims to speak the truth |
| avowal | noun | a statement asserting the existence or the truth of something |
| averment | noun | a declaration that is made emphatically (as if no supporting evidence were necessary) |
| swearer | noun | someone who takes a solemn oath |
| swearing | noun | a commitment to tell the truth (especially in a court of law); to lie under oath is to become subject to prosecution for perjury |
| assertive | adjective | aggressively self-assured |
| declare | verb | announce publicly or officially |