sixpence

As a noun sixpence

is the value of six old pence; half of a shilling; or one-fortieth of a pound sterling.

As an adjective undefined is

lacking a definition or value.

As an adjective threepenny

is having a value or cost of threepence.

As a noun sixpence is

the value of six old pence; half of a shilling; or one-fortieth of a pound sterling.

In historical terms the difference between sixpence and quarter

is that sixpence is a former British coin worth sixpence while quarter is each of the four divisions or watches of a twelve-hour night.

As nouns the difference between sixpence and quarter

is that sixpence is the value of six old pence; half of a shilling; or one-fortieth of a pound sterling while quarter is any one of four equal parts into which something has been divided.

As an adjective quarter is

pertaining to an aspect of a quarter.

As a verb quarter is

to divide into quarters.

As nouns the difference between taxonomy and sixpence

is that taxonomy is the science or the technique used to make a classification while sixpence is the value of six old pence; half of a shilling; or one-fortieth of a pound sterling.

As nouns the difference between sixpence and teston

is that sixpence is the value of six old pence; half of a shilling; or one-fortieth of a pound sterling while teston is a tester; a sixpence.

As a noun sixpence

is the value of six old pence; half of a shilling; or one-fortieth of a pound sterling.

As a proper noun zac is

a male given name, diminutive of zachariah and zachary.

As nouns the difference between sixpence and testor

is that sixpence is the value of six old pence; half of a shilling; or one-fortieth of a pound sterling while testor is (obsolete) a teston, a sixpence.