Acumen vs. Acuity vs. Acuteness

What are the Differences Between Acumen, Acuity, and Acuteness?


When to Use Acumen

Acumen is a noun meaning “quickness, accuracy, and keenness of judgment or insight.” For example,

  • His business acumen produced profitable year after profitable year.

    It is important to note that acumen is centered on being able to make good judgments and quick decisions, particularly in a given field (business, politics, agriculture, etc.).

    When to Use Acuity

    Acuity is also a noun and means “sharpness or keenness of thought, vision, or hearing.” For example,

  • Due to his age, his visual acuity is deteriorating.

    Acuity is used primarily to refer to hearing, understanding, vision, wit, and certain diseases.

    When to Use Acuteness

    Acuteness is the noun derivation of the adjective acute, which is defined as “having or showing perceptive understanding or insight: shrewd” and “a keen, highly developed physical sense.” For example,

  • His acuteness of engines led him to correctly diagnose the problem.

    Save the exceptions above, (hearing, understanding, vision, etc.), acuteness is more broadly used today than acuity when signifying general “sharpness” or “perception.”

    Summary

    While these words all have similar meanings, it is important to use them precisely in your writing and not to mix them up.

    Acumen refers to a keenness and insight in a particular field like business.

    Acuity refers to keenness of thought, vision, or hearing. Acuity has an earlier first recorded use than acuteness, but in practice its use has retreated somewhat.

    Acuteness refers to keenness of understanding and a highly developed physical sense. Between acuity and acuteness, acuteness is used more frequently.

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