The difference between Junk and Trash

When used as nouns, junk means discarded or waste material, whereas trash means useless things to be discarded.

When used as verbs, junk means to throw away, whereas trash means to discard.

check bellow for the other definitions of Junk and Trash

Junk as a noun:

Discarded or waste material; rubbish, trash.
Junk as a noun:

A collection of miscellaneous items of little value.
Junk as a noun (slang):

Any narcotic drug, especially heroin.
Junk as a noun (slang):

The clothed genitalia.
Junk as a noun (nautical):

Salt beef.
Junk as a noun:

Pieces of old cable or cordage, used for making gaskets, mats, swabs, etc., and when picked to pieces, forming oakum for filling the seams of ships.
Junk as a noun (dated):

A fragment of any solid substance; a thick piece; a chunk.

Examples:

"rfquotek Lowell"

Junk as a verb (transitive):

To throw away.
Junk as a verb (transitive):

To find something for very little money (meaning derived from the term junk shop)

Examples:

"(On Facebook, a record collector wrote:) "The newest addition to my Annette Hanshaw collection, I junked this beautiful flawless E-copy within walking distance from my house."

Trash as a noun (chiefly, US):

Useless things to be discarded; rubbish; refuse.
Trash as a noun:

A container into which things are discarded.
Trash as a noun:

Something worthless or of poor quality.
Trash as a noun (slang, derogatory):

People of low social status or class.
Trash as a noun (fandom, humorous, uncountable):

A fan who is excessively obsessed with their fandom and its fanworks.

Examples:

"I am Harry Potter trash."
Trash as a noun (computing):

Temporary storage on disk for files that the user has deleted, allowing them to be recovered if necessary.
Trash as a noun:

A collar, leash, or halter used to restrain a dog in pursuing game.

Examples:

"rfquotek Markham"

Trash as a verb (US):

To discard.
Trash as a verb (US):

To make into a mess.

Examples:

"The burglars trashed the house."
Trash as a verb (US):

To beat soundly in a game.
Trash as a verb (US):

To disrespect someone or something
Trash as a verb:

To free from trash, or worthless matter; hence, to lop; to crop.

Examples:

"to trash the rattoons of sugar cane"

"rfquotek B. Edwards"
Trash as a verb:

To treat as trash, or worthless matter; hence, to spurn, humiliate, or crush.
Trash as a verb:

To hold back by a trash or leash, as a dog in pursuing game; hence, to retard, encumber, or restrain; to clog; to hinder vexatiously.

Examples:

"rfquotek Beaumont and Fletcher"