In mathematics terms the difference between congruent and semistable

is that congruent is coinciding exactly when superimposed while semistable is describing a form of elliptic curve having congruent roots.

As adjectives the difference between congruent and semistable

is that congruent is corresponding in character while semistable is describing a form of elliptic curve having congruent roots.

As a proper noun root

is .

As an adjective semistable is

(mathematics) describing a form of elliptic curve having congruent roots.

As adjectives the difference between sixth and sextic

is that sixth is the ordinal form of the number six while sextic is (mathematics) of the sixth degree or order.

As nouns the difference between sixth and sextic

is that sixth is (not used in the plural) the person or thing in the sixth position while sextic is (mathematics) a quantic of the sixth degree.

As nouns the difference between boatswain and serang

is that boatswain is the officer (or warrant officer) in charge of sails, rigging, anchors, cables etc. and all work on deck of a sailing ship while serang is a native Indian boatswain.

As a noun positive

is .

As an adjective semidefinite is

(mathematics) describing a bilinear form, over a vector space, that is either always positive or always negative.

In mathematics terms the difference between negative and semidefinite

is that negative is a negative quantity while semidefinite is describing a bilinear form, over a vector space, that is either always positive or always negative.

As adjectives the difference between negative and semidefinite

is that negative is not positive or neutral while semidefinite is describing a bilinear form, over a vector space, that is either always positive or always negative.

As a noun negative

is refusal or withholding of assents; veto, prohibition.

As a verb negative

is to veto.

As adjectives the difference between linear and semilinear

is that linear is linear (in mathematics, of first-degree polynomial) while semilinear is (mathematics) describing equations involving both linear and nonlinear objects.

As adjectives the difference between nonlinear and semilinear

is that nonlinear is (of a set of points) not lying on a straight line while semilinear is (mathematics) describing equations involving both linear and nonlinear objects.

As nouns the difference between compounding and parasynthesis

is that compounding is an accumulation of compound interest while parasynthesis is (grammar) the formation of words by a combination of compounding and adding an affix.

As a verb compounding

is .

As nouns the difference between affix and parasynthesis

is that affix is that which is affixed; an appendage while parasynthesis is the formation of words by a combination of compounding and adding an affix.

As a verb affix

is to attach.