trailer

As nouns the difference between trial and trailer

is that trial is an opportunity to test something out; a test while trailer is trailer (vehicle).

As an adjective trial

is pertaining to a trial or test or trial can be characterized by having three (usually equivalent) components.

As a verb trial

is to carry out a series of tests on (a new product, procedure etc) before marketing or implementing it.

As a noun trailer

is trailer (vehicle).

As a proper noun dolly is

a diminutive of the female given name dorothy, and later also of dolores.

As nouns the difference between trailer and plot

is that trailer is trailer (vehicle) while plot is the course of a story, comprising a series of incidents which are gradually unfolded, sometimes by unexpected means.

As a verb plot is

to conceive (a crime, etc).