The difference between Remain and Tarry

When used as nouns, remain means that which is left, whereas tarry means a sojourn.

When used as verbs, remain means to stay behind while others withdraw, whereas tarry means to delay.

Tarry is also adjective with the meaning: resembling tar.

check bellow for the other definitions of Remain and Tarry

Remain as a noun (mostly, in the plural):

That which is left; relic; remainder.
Remain as a noun (in the plural):

That which is left of a human being after the life is gone; relics; a dead body.
Remain as a noun:

Posthumous works or productions, especially literary works.
Remain as a noun (obsolete):

State of remaining; stay.

Remain as a verb:

To stay behind while others withdraw; to be left after others have been removed or destroyed; to be left after a number or quantity has been subtracted or cut off; to be left as not included or comprised.
Remain as a verb:

To continue unchanged in place, form, or condition, or undiminished in quantity; to abide; to stay; to endure; to last.

Examples:

"There was no food in the house, so I had to remain hungry."
Remain as a verb:

To await; to be left to.
Remain as a verb (copulative):

To continue in a state of being.

Examples:

"The light remained red for two full minutes."

Tarry as a verb (intransitive, dated):

To delay; to be late or tardy in beginning or doing anything.

Examples:

"It is true that the Messiah will come, though he may tarry''. ([http://en.wikipedia.org/wiki/Christopher_Hitchens Hitchens] quoting translated [[Maimonides]])"
Tarry as a verb (intransitive, dated):

To linger in expectation of something or until something is done or happens.
Tarry as a verb (intransitive, dated):

To abide, stay or wait somewhere, especially if longer than planned.
Tarry as a verb (intransitive, dated):

To stay somewhere temporarily; to sojourn.
Tarry as a verb (transitive, dated):

To wait for; to stay or stop for; to allow to linger.