harden

As a noun harden

is .

As a verb practise is

(transitive|british|canada|australia|new zealand|ireland) to repeat as a way of improving one's skill in that activity.

As verbs the difference between unite and harden

is that unite is to come or bring together as one while harden is to become hard (tough, resistant to pressure).

As a verb rock

is (rycka).

As a noun harden is

.

Consolidate is a synonym of harden.

As a verb consolidate

is (ambitransitive) to combine into a single unit; to group together or join.

As an adjective consolidate

is (obsolete) formed into a solid mass; made firm; consolidated.

As a noun harden is

.

Cake is a synonym of harden.

As nouns the difference between cake and harden

is that cake is a rich, sweet dessert food, typically made of flour, sugar and eggs and baked in an oven, and often covered in icing while harden is .

As a verb cake

is coat (something) with a crust of solid material or cake can be (uk|dialect|obsolete|intransitive) to cackle like a goose.

Harden is a related term of compact.

As nouns the difference between harden and compact

is that harden is while compact is an agreement or contract or compact can be a small, slim folding case, often featuring a mirror, powder and a powderpuff; that fits into a woman's purse or handbag, or that slips into ones pocket.

As an adjective compact is

closely packed, ie packing much in a small space.

As a verb compact is

to make more dense; to compress.

As verbs the difference between harden and hardened

is that harden is to become hard (tough, resistant to pressure) while hardened is past tense of harden.

As an adjective hardened is

unfeeling or lacking emotion due to experience; callous.

In intransitive terms the difference between combine and harden

is that combine is to come together; to unite while harden is to become hard (tough, resistant to pressure).

As verbs the difference between combine and harden

is that combine is to bring (two or more things or activities) together; to unite while harden is to become hard (tough, resistant to pressure).

As a noun combine

is a combine harvester.

As a proper noun Combine

is london Underground.

As verbs the difference between harden and condense

is that harden is to become hard (tough, resistant to pressure) while condense is to decrease size or volume by concentration toward the essence.

As an adjective condense is

condensed; compact; dense.