Posterize is a related term of posterization.

As a noun posterization

is the act or process of posterizing.

As a verb posterize is

to reduce the number of colors in an , changing a continuous gradation of tone to several regions of fewer tones, with abrupt changes from one tone to another.

As nouns the difference between valley and clough

is that valley is an elongated depression between hills or mountains, often with a river flowing through it while clough is a narrow valley; a cleft in a hillside; a ravine, glen, or gorge.

As proper nouns the difference between valley and clough

is that valley is the San Fernando Valley in southern California while Clough is {{surname|lang=en|from=common nouns}.

As a noun cleft

is an opening, fissure, or v-shaped indentation made by or as if by splitting.

As a verb cleft

is (cleave).

As a proper noun clough is

.

As a verb ravine

is .

As a proper noun clough is

.

As proper nouns the difference between glen and clough

is that glen is for someone who lives in a valley while clough is .

As a noun chlorastrolite

is a green or bluish variety of pumpellyite.

As a proper noun greenstone is

.

As nouns the difference between serpentine and greenstone

is that serpentine is any of several plants believed to cure snakebites while greenstone is any of several green-hued minerals used for making various artefacts in early Mesoamerican cultures, e.g. greenschist, chlorastrolite, serpentine, omphacite, or chrysoprase.

As proper nouns the difference between serpentine and greenstone

is that serpentine is the lake in Hyde Park, London while Greenstone is {{surname}.

As an adjective serpentine

is sinuous; curving in alternate directions.

As a verb serpentine

is to serpentize; to turn or bend; to meander.

As a noun omphacite

is (mineralogy) any of a range of green, monoclinic pyroxene minerals found in eclogites and similar rocks; they are solid solutions of jadeite and diopside.

As a proper noun greenstone is

.

As a noun chrysoprase

is (mineral) a variety of light-green translucent quartz.

As a proper noun greenstone is

.

As a noun tool

is (senseid)a mechanical device intended to make a task easier.

As a verb tool

is to work on or shape with tools, eg, hand-tooled leather .

As a proper noun greenstone is

.