Synonyms of the word

noetic

• adj. Of or pertaining to the mind or intellect.
• adj. Originating in or apprehended by reason.
• n. The science of the intellect.
• n. A purely intellectual entity.

intellectual

• adj. Belonging to, or performed by, the intellect; mental or cognitive; as, intellectual powers, activities,…
• adj. Endowed with intellect; having the power of understanding; having capacity for the higher forms of knowledge…
• adj. Suitable for exercising the intellect; formed by, and existing for, the intellect alone; perceived by…
• adj. Relating to the understanding; treating of the mind; as, intellectual philosophy, sometimes called "mental"…
• adj. (archaic, poetic) Spiritual.
• n. An intelligent, learned person, especially one who discourses about learned matters.
• n. (archaic) The intellect or understanding; mental powers or faculties.

mental

• adj. Of or relating to the mind or an intellectual process.
• adj. (colloquial, comparable) Insane, mad, crazy.
• adj. (colloquial, Britain, comparable) Enjoyable; fun.
• adj. (anatomy) Of or relating to the chin or median part of the lower jaw, genial.
• adj. (biology) Of or relating to the chin-like or lip-like structure.
• n. (zoology) A plate or scale covering the mentum or chin of a fish or reptile.

rational

• adj. Capable of reasoning.
• adj. Logically sound; not contradictory or otherwise absurd.
• adj. (of a person or personal characteristics) Healthy or balanced intellectually; exhibiting reasonableness.
• adj. (mathematics, arithmetic, number theory, not comparable) Of a number, capable of being expressed as the…
• adj. (mathematics, arithmetic, not comparable) Of an algebraic expression, capable of being expressed as the…
• adj. (chemistry) Expressing the type, structure, relations, and reactions of a compound; graphic; said of formulae.
• adj. (physics) Expressing a physical object.
• n. (mathematics) A rational number: a number that can be expressed as the quotient of two integers.
• n. the breastplate worn by Israelite high priests.