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Expertise vs. Expertize: What's the Difference?

Edited by Aimie Carlson || By Janet White || Updated on October 3, 2023
Expertise refers to specialized knowledge or skill, while Expertize is an uncommon, archaic variant of "expertise" and essentially means the same.

Key Differences

Expertise is a noun widely used in modern English. It refers to the deep knowledge, skill, or proficiency in a particular subject or activity. Think of a scientist who has spent decades researching a single topic; the depth of understanding they have achieved represents expertise. Expertize, on the other hand, is less commonly seen in contemporary writings. Essentially, it's an older form of "expertise" but means the same thing.
In many professional fields, Expertise is a sought-after trait. Whether in medicine, law, engineering, or the arts, expertise represents the pinnacle of understanding and capability. Expertize, while holding the same meaning, might throw off some readers due to its infrequent use in modern times.
Furthermore, the popularity of the term Expertise has grown significantly with the rise of specialized industries and academic disciplines. In contrast, Expertize has gradually faded from everyday language, perhaps considered more archaic and less accessible than its counterpart.
That said, both terms encapsulate the essence of mastery in a domain. Expertise is, however, the term you'll encounter most, from professional resumes to academic journals. Expertize, with its antiquated ring, might be reserved for more poetic or historically inclined contexts.
Lastly, it's essential to note that the distinction is primarily based on usage trends and stylistic preferences. In essence, Expertise and Expertize carry the same weight and meaning, but the former is much more universally recognized.

Comparison Chart


Specialized knowledge or skill in a domain.
Same as expertise, but less commonly used.


Common in modern English.
Infrequent and considered archaic.



Associated Connotations

Modern, professional, specialized.
Historical, old-fashioned.

Example Contexts

Professional settings, resumes, academic writings.
Older literature, poetic or historically inclined texts.

Expertise and Expertize Definitions


Specialized knowledge or skills in a specific field.
His expertise in marine biology is unparalleled.


An old-fashioned term referring to specialized mastery.
The manuscript spoke of his expertize in ancient rituals.


Authority derived from specialized knowledge.
The panel's combined expertise provided a comprehensive review of the topic.


Skillfulness derived from experience, used in older texts.
Warriors of old were known for their expertize in battle.


Proficiency acquired through training or experience.
Years of playing the piano gave her remarkable musical expertise.


Deep understanding or proficiency in a subject, less commonly used.
His expertize in the arts was well-known in his time.


An expert's skill or knowledge in a particular domain.
We hired her for her expertise in financial planning.


Authority in a domain, as mentioned in historical contexts.
The guild recognized his expertize in craftsmanship.


Mastery or competency in a subject.
His expertise in foreign policy made him a valuable asset to the team.


A seldom-used term for expert knowledge.
His expertize in navigation was noted in the ship's logs.


Skill or knowledge in a particular area.


(intransitive) To act as an expert.


Great skill or knowledge in a particular field or hobby.
The scientist has expertise in the field of nuclear fusion.


(transitive) To give an expert opinion on; to assess.


Advice, or opinion, of an expert.


To supply with expert knowledge or advice.


Skillfulness by virtue of possessing special knowledge


Is "expertize" a valid word?

Yes, but it's an archaic and less common form of "expertise."

Do both terms mean the same?

Essentially, yes. Both refer to specialized knowledge or skill.

Why is "expertise" more common?

Language evolves, and "expertise" has become the preferred term in modern English.

Is "expertize" found in any notable literature?

It might appear in older texts, but in contemporary writings, "expertise" is prevalent.

Can I use "expertize" in formal writing?

While technically correct, it might seem outdated. "Expertise" is recommended for clarity.
About Author
Written by
Janet White
Janet White has been an esteemed writer and blogger for Difference Wiki. Holding a Master's degree in Science and Medical Journalism from the prestigious Boston University, she has consistently demonstrated her expertise and passion for her field. When she's not immersed in her work, Janet relishes her time exercising, delving into a good book, and cherishing moments with friends and family.
Edited by
Aimie Carlson
Aimie Carlson, holding a master's degree in English literature, is a fervent English language enthusiast. She lends her writing talents to Difference Wiki, a prominent website that specializes in comparisons, offering readers insightful analyses that both captivate and inform.

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