disappoint

As a noun devastation

is devastation, destruction.

As a verb disappoint is

to displease by eg underperforming or disappoint can be (internet slang).

As verbs the difference between exasperate and disappoint

is that exasperate is to frustrate, vex, provoke, or annoy; to make angry while disappoint is to displease by eg underperforming or disappoint can be (internet slang).

As an adjective exasperate

is (obsolete) exasperated; embittered.

As verbs the difference between offend and disappoint

is that offend is   To hurt the feelings of; to displease; to make angry; to insult while disappoint is to displease by e.g. underperforming.

As verbs the difference between disappoint and period

is that disappoint is to displease by eg underperforming or disappoint can be (internet slang) while period is (obsolete|intransitive) to come to a period; to conclude.

As an adjective period is

appropriate for a given historical era.

As an interjection period is

(chiefly|north america) and nothing else; and nothing less; used for emphasis.

As a noun period is

(obsolete|medicine) the length of time for a disease to run its course.

As a verb disappoint

is to displease by e.g. underperforming.

As an adjective sad is

sated, having had one's fill; satisfied, weary.

As an acronym SAD is

seasonal affective disorder.

As verbs the difference between discourage and disappoint

is that discourage is to extinguish the courage of; to dishearten; to depress the spirits of; to deprive of confidence; to deject while disappoint is to displease by e.g. underperforming.

As a noun discourage

is {{cx|rare|lang=en}} Lack of courage.

Mock is a synonym of disappoint.

As verbs the difference between mock and disappoint

is that mock is to mimic, to simulate while disappoint is to displease by eg underperforming or disappoint can be (internet slang).

As a noun mock

is an imitation, usually of lesser quality.

As an adjective mock

is imitation, not genuine; fake.

Disappoint is a related term of deride.

As verbs the difference between disappoint and deride

is that disappoint is to displease by eg underperforming or disappoint can be (internet slang) while deride is .

Taunt is a related term of disappoint.

As verbs the difference between taunt and disappoint

is that taunt is to make fun of (someone); to (a person) into responding, often in an aggressive manner while disappoint is to displease by eg underperforming or disappoint can be (internet slang).

As a noun taunt

is a scornful or mocking remark; a jeer or mockery.

As an adjective taunt

is (nautical) very high or tall.

Disappoint is a synonym of foil.

As verbs the difference between disappoint and foil

is that disappoint is to displease by eg underperforming or disappoint can be (internet slang) while foil is to prevent (something) from being accomplished or foil can be (mathematics) to multiply two binomials together or foil can be (obsolete) to defile; to soil.

As a noun foil is

a very thin sheet of metal or foil can be failure when on the point of attainment; defeat; frustration; miscarriage or foil can be (hunting) the track of an animal.