As nouns the difference between prism and pentaprism

is that prism is a polyhedron with parallel ends of the same size and shape, the other faces being parallelogram-shaped sides while pentaprism is a five-sided prism used in the viewfinder of some single-lens reflex cameras.

As nouns the difference between viewfinder and pentaprism

is that viewfinder is a device on a camera that shows what will appear in the field of view of the lens; it helps the user target a subject, zoom and focus the while pentaprism is a five-sided prism used in the viewfinder of some single-lens reflex cameras.

As nouns the difference between pentaerythritol and pentaerythrityl

is that pentaerythritol is the polyhydric alcohol 2,2-bis(hydroxymethyl)1,3-propanediol C(CH₂OH)₄pentaerythrityl is the tetravalent radical derived from pentaerythritol.

As nouns the difference between silicate and pentagonite

is that silicate is while pentagonite is (mineralogy) a silicate of calcium and vanadium found in basalts and tuffs.

As nouns the difference between calcium and pentagonite

is that calcium is a chemical element, atomic number 20, that is an alkaline earth metal and occurs naturally as carbonate in limestone and as silicate in many rocks while pentagonite is a silicate of calcium and vanadium found in basalts and tuffs.

As nouns the difference between vanadium and pentagonite

is that vanadium is vanadium (symbol: v) while pentagonite is (mineralogy) a silicate of calcium and vanadium found in basalts and tuffs.

As nouns the difference between basalt and pentagonite

is that basalt is a hard mafic igneous rock of varied mineral content; volcanic in origin, it makes up much of the Earth's oceanic crust while pentagonite is a silicate of calcium and vanadium found in basalts and tuffs.

As nouns the difference between tuff and pentagonite

is that tuff is (rock) a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel while pentagonite is (mineralogy) a silicate of calcium and vanadium found in basalts and tuffs.

As an adjective tuff

is older and simplified spelling of tough.

As nouns the difference between calcium and pentahydroborite

is that calcium is a chemical element, atomic number 20, that is an alkaline earth metal and occurs naturally as carbonate in limestone and as silicate in many rocks while pentahydroborite is a basic calcium borate found in skarn minerals.

As nouns the difference between borate and pentahydroborite

is that borate is a salt formed by the combination of boric acid with a base or positive radical while pentahydroborite is a basic calcium borate found in skarn minerals.