happen

As a noun happen

is morsel.

As a verb follow is

to go after; to pursue; to move behind in the same path or direction.

As nouns the difference between happen and fallout

is that happen is morsel while fallout is radioactive fallout (radioactive particles that fall to the ground).

As a noun happen

is morsel.

As a verb intervene is

(ambitransitive) to come between, or to be between, persons or things.

As a noun happen

is morsel.

As a proper noun spring is

spring, the season of warmth and new vegetation following winter.

As nouns the difference between happen and crop

is that happen is morsel while crop is a plant, especially a cereal, grown to be harvested as food, livestock fodder or fuel or for any other economic purpose.

As a verb crop is

to remove the top end of something, especially a plant.

As nouns the difference between happen and shape

is that happen is morsel while shape is the status or condition of something.

As a verb shape is

to give something a shape and definition.

As nouns the difference between happen and rise

is that happen is morsel while rise is the process of or an action or instance of moving upwards or becoming greater.

As a verb rise is

(label) to move, or appear to move, physically upwards relative to the ground.

As verbs the difference between happen and develop

is that happen is to occur or take place while develop is to change with a specific direction, progress.

As an adverb happen

is obsolete or dialect maybe, perhaps.

As nouns the difference between happen and break

is that happen is morsel while break is break.