As verbs the difference between classify and catalogue

is that classify is to identify by or divide into classes; to categorize while catalogue is to put into a catalogue.

As a noun catalogue is

a systematic list of names, books, pictures etc.

Detachment is a related term of horde.

As a noun detachment

is (uncountable) the action of detaching; separation.

As an adjective horde is

.

As a verb horde is

.

Stronghold is a related term of bulwark.

As nouns the difference between stronghold and bulwark

is that stronghold is a fortress while bulwark is a defensive wall or rampart.

As a verb bulwark is

to fortify something with a wall or rampart.

Characterisation is a synonym of description.

As nouns the difference between characterisation and description

is that characterisation is (british spelling) while description is a sketch or account of anything in words; a portraiture or representation in language; an enumeration of the essential qualities of a thing or species.

Fluid is a related term of thawed.

As a noun fluid

is fluid.

As a verb thawed is

(thaw).

Pack is a related term of array.

As nouns the difference between pack and array

is that pack is package, bundle, bunch, (unwieldy) bag or pack can be rabble, mob, vermin, rascals while array is clothing and ornamentation.

As a verb array is

to clothe and ornament; to adorn or attire.

Regular is a related term of wonted.

As adjectives the difference between regular and wonted

is that regular is while wonted is usual, customary, habitual, or accustomed.

As an adverb regular

is regularly.

Gaiety is a related term of joviality.

As nouns the difference between gaiety and joviality

is that gaiety is (uncountable)  the state of being happy while joviality is the state of being jovial; jollity or conviviality.

Panic is a related term of worry.

As an adjective panic

is pandean.

As a verb worry is

to seize or shake by the throat, especially of a dog or wolf.

As a noun worry is

a strong feeling of anxiety.

Hurt is a related term of devastation.

As nouns the difference between hurt and devastation

is that hurt is an emotional or psychological hurt (humiliation or bad experience) while devastation is devastation, destruction.

As a verb hurt

is to be painful.

As an adjective hurt

is wounded, physically injured.