As adjectives the difference between polychrome and bichrome

is that polychrome is executed in the manner of polychromy while bichrome is having two colors.

As a noun polychrome

is (chemistry) esculin (so called in allusion to its fluorescent solutions).

As adjectives the difference between faulty and defaulty

is that faulty is having or displaying faults; not perfect; not adequate or acceptable while defaulty is .

As nouns the difference between epaulette and insignia

is that epaulette is epaulette while insignia is insignia.

As adjectives the difference between adjacent and tangential

is that adjacent is lying next to, close, or contiguous; neighboring; bordering on while tangential is referring to a tangent, moving at a tangent to something.

As a noun adjacent

is something that lies next to something else, especially the side of a right triangle that is neither the hypotenuse nor the opposite.

As a preposition adjacent

is (us) next to; adjacent to; beside.

As verbs the difference between delinquent and accused

is that delinquent is while accused is (accuse).

As a noun accused is

(legal) the person charged with an offense; the defendant in a criminal case.

As an adjective accused is

having been accused; being the target of accusations.

As adjectives the difference between plain and spare

is that plain is while spare is scanty; not abundant or plentiful.

As nouns the difference between plain and spare

is that plain is (rare|poetic) a lamentation or plain can be an expanse of land with relatively low relief while spare is the act of sparing; moderation; restraint.

As verbs the difference between plain and spare

is that plain is to lament, bewail or plain can be (obsolete|transitive) to plane or level; to make plain or even on the surface while spare is to show mercy.

As an adverb plain

is (colloquial) simply.

As nouns the difference between bookmark and tab

is that bookmark is a strip of material used to mark a place in a book while tab is a key on computer keyboards.

As a verb bookmark

is (computing|transitive) to create a bookmark.