derailment

As nouns the difference between derailment and crash

is that derailment is (rail transport) the action of a locomotive or train leaving the rails along which it runs while crash is an automobile, airplane, or other vehicle accident or crash can be (fibre) plain linen.

As an adjective crash is

quick, fast, intensive.

As a verb crash is

to collide with something destructively, fall or come down violently.

As nouns the difference between derailment and tangentiality

is that derailment is the action of a locomotive or train leaving the rails along which it runs while tangentiality is a mental condition in which one tends to digress from the topic under discussion, especially by word association.

Flightofideas is likely misspelled.

Flightofideas has no English definition.

As a noun derailment is

the action of a locomotive or train leaving the rails along which it runs.

As a noun derailment is

(rail transport) the action of a locomotive or train leaving the rails along which it runs.

As nouns the difference between derailment and defailment

is that derailment is (rail transport) the action of a locomotive or train leaving the rails along which it runs while defailment is (obsolete) failure.

As nouns the difference between taxonomy and derailment

is that taxonomy is the science or the technique used to make a classification while derailment is (rail transport) the action of a locomotive or train leaving the rails along which it runs.