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World 2 · Name Detective · Lesson 06

Identical and confusingly similar names

Risk does not come only from identical names. Names that sound, look or mean the same can conflict too.

  • 5 min
  • Jurisdictions: International / treaty, Australia, Vietnam
  • Last reviewed: 18 October 2026

Draft — awaiting editorial review

Educational content, not legal advice. Lessons are drafts awaiting editorial review.

You will learn to

  • Recognise the three dimensions of similarity: look, sound and meaning.
  • Understand why the relatedness of goods or services matters.
  • Make a first assessment of the risk between two names.

Look, sound and meaning

IP offices and courts usually compare two marks by look (spelling), sound (pronunciation) and meaning (concept). They consider the overall impression, not a letter count. Translations and transliterations can matter too: an English name and its Vietnamese translation may be treated as similar in meaning.

Are the goods or services related?

Two similar marks can coexist when used for very different things — the same word for industrial paint and for travel services, say. Risk rises sharply when the goods or services are the same, complementary, or sold through the same channels to the same customers. Very well-known marks can receive broader protection.

Reading a search honestly

No identical hit does not mean safe. Search spelling variants, sound-alikes, synonyms and translations too. Record which databases you searched, for which countries, on which date — because a register does not include unregistered marks that are already in use, and recent applications may not appear yet.

Try a scenario

You plan to launch an energy drink called "Vortexa". A search shows "VORTEX" registered for beverages, and "Vortexa" registered for data-analytics services.

Which registration is the bigger concern?

Check your understanding

ModeSee the explanation after each question.

Pass mark: 80% — for this lesson that means every question.

Question 1 of 4When comparing two marks, what do IP offices usually look at?

Take away

Search spelling variants, sound-alikes and translations — and always record the scope of the search.

Apply it to your IP

Nothing runs or is saved on its own. Each option only opens a tool when you choose it.

What this lesson cannot tell you

Likelihood of confusion is a legal judgement that varies by country and by case. This lesson only helps you ask the right question.

Official references