The difference between Initiate and Trigger

When used as nouns, initiate means a new member of an organization, whereas trigger means a finger-operated lever used to fire a gun.

When used as verbs, initiate means to begin, whereas trigger means to fire a weapon.

Initiate is also adjective with the meaning: unpractised.

check bellow for the other definitions of Initiate and Trigger

Initiate as an adjective (obsolete):

Unpractised; untried; new.
Initiate as an adjective (obsolete):

Begun; commenced; introduced to, or instructed in, the rudiments; newly admitted.

Initiate as a verb (transitive):

To begin; to start.
Initiate as a verb:

To instruct in the rudiments or principles; to introduce.
Initiate as a verb:

To confer membership on; especially, to admit to a secret order with mysterious rites or ceremonies.
Initiate as a verb (intransitive):

To do the first act; to perform the first rite; to take the initiative.

Examples:

"rfquotek Alexander Pope"

Trigger as a noun:

A finger-operated lever used to fire a gun.

Examples:

"Just pull the trigger."
Trigger as a noun:

A similar device used to activate any mechanism.
Trigger as a noun:

An event that initiates others, or incites a response.

Examples:

"Sleeping in an unfamiliar room can be a trigger for sleepwalking."
Trigger as a noun:

A concept or image that upsets somebody.

Examples:

"I can't watch that violent film. Blood is one of my triggers."
Trigger as a noun (psychology):

An event, experience or other stimulus that initiates a traumatic memory or action in a person.
Trigger as a noun (music):

An electronic transducer allowing a drum, cymbal, etc. to control an electronic drum unit or similar device.
Trigger as a noun (music):

A device that manually lengthens (or sometimes shortens) the slide or tubing of a brass instrument, allowing the pitch range to be altered while playing.
Trigger as a noun (electronics):

A pulse in an electronic circuit that initiates some component.
Trigger as a noun (databases):

An SQL procedure that may be initiated when a record is inserted, updated or deleted; typically used to maintain referential integrity.
Trigger as a noun (online gaming):

A text string that, when received by a player, will cause the player to execute a certain command.
Trigger as a noun (archaic):

A catch to hold the wheel of a carriage on a declivity.

Trigger as a verb (transitive):

To fire a weapon.
Trigger as a verb (transitive):

To initiate something.

Examples:

"The controversial article triggered a deluge of angry letters from readers."
Trigger as a verb (transitive, sensitive):

To spark a response, especially a negative emotional response, in (someone).

Examples:

"This story contains a rape scene and may be triggering for rape victims."
Trigger as a verb (intransitive, especially, electronics):

To activate; to become active.