As nouns the difference between sundial and gnomonics

is that sundial is a simple timekeeping device in which the shadow cast by a vertical pole or plate (the gnomon) is used to indicate the time of day while gnomonics is the art of designing and constructing sundials.

As nouns the difference between belief and impossibilism

is that belief is mental acceptance of a claim as likely true while impossibilism is a belief in unrealizable or impractical policies.

As an adjective unrealizable

is not realizable; unable to be achieved or realized.

As a noun impossibilism is

a belief in unrealizable or impractical policies.

As an adjective impractical

is not practical; impracticable.

As a noun impossibilism is

a belief in unrealizable or impractical policies.

As nouns the difference between ellipsoid and indicatrix

is that ellipsoid is ellipsoid (surface all of whose cross sections are elliptic or circular) while indicatrix is (mathematics|crystallography) an ellipsoid whose three axes]] represent the [[refractive index|refractive indices of an anisotropic crystal for light following different directions with respect to the crystal axes.

As verbs the difference between presage and foretoken

is that presage is while foretoken is to betoken beforehand; prognosticate; foreshadow; give warning; presage.

As a noun foretoken is

a prognostic; a premonitory sign; warning or presentment.

As an adjective triangular

is shaped like a triangle.

As a noun foretriangle is

(nautical) a triangular space on a sailing ship between the deck, foremast, and forestay.

As an adjective deck

is thick.

As a noun foretriangle is

(nautical) a triangular space on a sailing ship between the deck, foremast, and forestay.

In nautical|lang=en terms the difference between foremast and foretriangle

is that foremast is (nautical) (on a ship with more than one mast ) the mast nearest the bow while foretriangle is (nautical) a triangular space on a sailing ship between the deck, foremast, and forestay.

As nouns the difference between foremast and foretriangle

is that foremast is (nautical) (on a ship with more than one mast ) the mast nearest the bow while foretriangle is (nautical) a triangular space on a sailing ship between the deck, foremast, and forestay.

In nautical|lang=en terms the difference between forestay and foretriangle

is that forestay is (nautical) a stay that extends from the top of the foremast to the bow or bowsprit of a sailing ship while foretriangle is (nautical) a triangular space on a sailing ship between the deck, foremast, and forestay.

As nouns the difference between forestay and foretriangle

is that forestay is (nautical) a stay that extends from the top of the foremast to the bow or bowsprit of a sailing ship while foretriangle is (nautical) a triangular space on a sailing ship between the deck, foremast, and forestay.

As a verb forestay

is to stay beforehand; secure or fasten with or as with a forestay or forestay can be to stay, delay, postpone, or hinder beforehand; forestall; prevent.