frustration

As an adjective cynical

is of or relating to the cynics, a sect of ancient greek philosophers who believed virtue to be the only good and self-control to be the only means of achieving virtue.

As a noun frustration is

frustration.

As nouns the difference between bitter and frustration

is that bitter is (usually in the plural bitters) a liquid or powder, made from bitter herbs, used in mixed drinks or as a tonic while frustration is frustration.

As an adjective bitter

is having an acrid taste (usually from a basic substance).

As a verb bitter

is to make bitter.

As nouns the difference between fear and frustration

is that fear is grass while frustration is frustration.

As a noun frustration

is frustration.

As an adjective scandalous is

wrong, immoral, causing a scandal.

As a noun frustration

is frustration.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between neutralization and frustration

is that neutralization is the act of neutralizing while frustration is frustration.

As nouns the difference between boredom and frustration

is that boredom is (uncountable) the state of being bored while frustration is frustration.

As nouns the difference between frustration and exhaust

is that frustration is the act of frustrating, or the state, or an instance of being frustrated while exhaust is a system consisting of the parts of an engine through which burned gases or steam are discharged; see also exhaust system.

As a verb exhaust is

to draw or let out wholly; to drain off completely; as, to exhaust the water of a well; the moisture of the earth is exhausted by evaporation.

As an adjective exhaust is

exhausted; used up.