Gullfoss
geographical name
Gull·foss ˈgᵫ-dᵊl-ˌfȯs—sic 
waterfall, a popular tourist attraction in southwestern Iceland 105 feet (32 meters) high
- trigonellas
- trigoneutic
- Trigonia
- Trigoniaceae
- trigoniaceous
- trigonite
- trigono
- trigono-
- trigonocephalic
- trigonocephalous
- trigonocephaly
- trigonocerous
- trigonododecahedron
- trigonometer
- trigonometers
- trigonometric
- trigonometric curve
- trigonometric equation
- trigonometric function
- trigonometric identity
- trigonometric parallax
- trigonometric series
- trigonometric solution
- trigonometrical
- trigonometrically