As a noun sluice

is an artificial passage for water, fitted with a valve or gate, as in a mill stream, for stopping or regulating the flow; also, a water gate or flood gate.

As a verb sluice

is (rare) to emit by, or as by, flood gates.

As a proper noun clough is

.

As proper nouns the difference between channel and clough

is that channel is (by ellipsis) the english channel while clough is .

As a noun sediment

is sediment.

As a proper noun clough is

.

As proper nouns the difference between cliff and clough

is that cliff is a diminutive of the male given name clifford while clough is .

As proper nouns the difference between rocky and clough

is that rocky is a male given name, pet form of rocco while clough is .

As a noun precipice

is precipice, deep and steep escarpment.

As a proper noun clough is

.

As a noun fork

is a pronged tool having a long straight handle, used for digging, lifting, throwing etc.

As a verb fork

is to divide into two or more branches.

As a proper noun clough is

.

As a noun tree

is a large plant, not exactly defined, but typically over four meters in height, a single trunk which grows in girth with age and branches (which also grow in circumference with age).

As a verb tree

is to chase (an animal or person) up a tree.

As a proper noun clough is

.

As nouns the difference between crotch and clough

is that crotch is the area where something forks or branches, a ramification takes place while clough is a narrow valley; a cleft in a hillside; a ravine, glen, or gorge.

As a proper noun Clough is

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As a proper noun ivy

is ; popular in the uk in the beginning of the 20th century.

As an adjective radicant is

(botany) taking root on, or above, the ground; rooting from the stem, as the trumpet creeper and the ivy.