| Rank | Abbreviation | Meaning |
|---|
| ***** | NICHE CRUISE, NICHE CRUISING. | A market segment of the cruise industry comprising smaller or unconventional vessels with an emphasis on adventure or ecological itineraries.
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| *** | CERTIFIED NICHE SPECIALIST (CNS). | One who has taken a course in the areas of either Mature Adult, Family, or Special Interest Travel administered by the American Society of Travel Agents.
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| * | NICHE | Nurses Improving Care to the Hospitalized Elderly
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| * | NICHE | Network of Iowa Christian Home Educators
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| * | NICHE | North Idaho Center for Higher Education
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| * | NICHE | Northeastern Indiana Catholic Home Educators
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| * | NICHE | Northern Ireland Centre for Food and Health
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| * | NICHE | Nurses Improving Care for Healthsystem Elders
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| * | NICHE | Network of Illinois Catholic Home Educators
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| * | NICHE | Natal Institute for Community Health
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| * | NICHE | New Industry Creation Hatchery Center
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| * | NICHE | National Institute of Continuing Housing Education
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| * | NICHE | Northern Interior Community Home Educators
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| * | NICHE | Northern Inclusive Colorado Home Educators
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| * | NICHE | Network of Inclusive Coastal Home Educators
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| * | NICHE | Nevis International Culinary Heritage Exposition
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| * | NICHE | Nyando Integrated Child Health and Education
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| * | NICHE | Networking Information Connection for Home Educators
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