Solutions Describing a triangle with unequal sides has 4 entries with similar clues

• 9-letter words
• trapeziumQuadrilateral with pairs of unequal parallel sides
• isoscelesDescribing a triangle with two equal sides
• 16-letter words
• scalene-triangleA triangle having no two sides equal
• 18-letter words
• isosceles-triangleTriangle with two sides equal