Synonyms of the word

rightful

• adj. By right, by law.

just

• adj. Factually right, correct; factual.
• adj. Rationally right, correct.
• adj. Morally right; upright, righteous, equitable; fair.
• adj. Proper, adequate.
• adv. Only, simply, merely.
• adv. (sentence adverb) Used to reduce the force of an imperative; simply.
• adv. (speech act) Used to convey a less serious or formal tone.
• adv. (speech act) Used to show humility.
• adv. (degree) absolutely, positively.
• adv. Moments ago, recently.
• adv. By a narrow margin; closely; nearly.
• adv. Exactly, precisely, perfectly.
• n. A joust, tournament.
• v. To joust, fight a tournament.

lawful

• adj. Conforming to, or recognised by law or rules.

legitimate

• adj. In accordance with the law or established legal forms and requirements; lawful.
• adj. Conforming to known principles, or established or accepted rules or standards; valid.
• adj. Authentic, real, genuine.
• adj. Lawfully begotten, i.e., born to a legally married couple.
• adj. Relating to hereditary rights.
• n. A person born to a legally married couple.
• v. To make legitimate, lawful, or valid; especially, to put in the position or state of a legitimate person…

true

• adj. (of a statement) Conforming to the actual state of reality or fact; factually correct.
• adj. Conforming to a rule or pattern; exact; accurate.
• adj. (logic) Of the state in Boolean logic that indicates an affirmative or positive result.
• adj. Loyal, faithful.
• adj. Genuine.
• adj. Legitimate.
• adj. (of an aim or missile in archery, shooting, golf, etc.) Accurate; following a path toward the target.
• adj. (chiefly probability) Fair, unbiased, not loaded.
• adv. (of shooting, throwing etc) Accurately.
• n. Truth.
• n. The state of being in alignment.
• v. To straighten.
• v. To make even, level, symmetrical, or accurate, align; adjust.