As an adverb twice

is two times.

As an adjective biconjugate is

(botany) paired twice.

In mathematics|lang=en terms the difference between conjugate and biconjugate

is that conjugate is (mathematics) an explementary angle while biconjugate is (mathematics) conjugate in two ways.

In botany|lang=en terms the difference between conjugate and biconjugate

is that conjugate is (botany) in single pairs; coupled while biconjugate is (botany) paired twice.

As adjectives the difference between conjugate and biconjugate

is that conjugate is united in pairs; yoked together; coupled while biconjugate is (botany) paired twice.

As a verb conjugate

is (grammar|transitive) to inflect (a verb) for each person, in order, for one or more tenses.

As a noun conjugate

is any entity formed by joining two or more smaller entities together.

As nouns the difference between spear and bident

is that spear is a long stick with a sharp tip used as a weapon for throwing or thrusting, or anything used to make a thrusting motion while bident is a form of spear having two prongs.

As a verb spear

is to penetrate or strike with, or as if with, any long narrow object. To make a thrusting motion that catches an object on the tip of a long device.

As a proper noun Spear

is {{surname|A=An English|from=nicknames}.

As nouns the difference between prong and bident

is that prong is a thin, pointed, projecting part while bident is a form of spear having two prongs.

As a verb prong

is to pierce or poke with, or as if with, a prong.

As nouns the difference between trident and bident

is that trident is a three-pronged spear somewhat resembling a pitchfork while bident is a form of spear having two prongs.

As a pronoun toe

is .

As an adjective bicolligate is

(ornithology) having the anterior toes united by a basal web.

As adjectives the difference between united and bicolligate

is that united is joined into a single entity while bicolligate is having the anterior toes united by a basal web.

As a verb united

is past tense of unite.

As a proper noun United

is any of many football teams formed by the amalgamation of smaller ones.

As adjectives the difference between basal and bicolligate

is that basal is relating to, or forming, the base, or point of origin while bicolligate is (ornithology) having the anterior toes united by a basal web.

As a noun basal

is (anatomy) any basal structure or part.

As a proper noun web

is (possibly|informal|outside|attributive use) the world wide web.

As an adjective bicolligate is

(ornithology) having the anterior toes united by a basal web.

As a verb paired

is (pair).

As an adjective biconjugate is

(botany) paired twice.