The difference between Aid and Hinder

When used as nouns, aid means help, whereas hinder means the buttocks.

When used as verbs, aid means to (give) support (to), whereas hinder means to make difficult to accomplish.

Hinder is also adjective with the meaning: of or belonging to that part or end which is in the rear or hind, or which follows.

check bellow for the other definitions of Aid and Hinder

Aid as a noun (uncountable):

Help; assistance; succor, relief.

Examples:

"He came to my aid when I was foundering."
Aid as a noun (countable):

A helper; an assistant.
Aid as a noun (countable):

Something which helps; a material source of help.

Examples:

"Slimming aids include dietary supplements and appetite suppressants."
Aid as a noun (countable, British):

An historical subsidy granted to the crown by Parliament for an extraordinary purpose, such as a war effort.
Aid as a noun (countable, British):

An exchequer loan.
Aid as a noun (countable, legal):

A pecuniary tribute paid by a vassal to his feudal lord on special occasions.
Aid as a noun (countable):

An aide-de-camp, so called by abbreviation.

Examples:

"The incompetent general's brilliant aid often made priceless suggestions."

Aid as a verb (transitive):

To (give) support (to); to further the progress of; to help; to assist.

Hinder as a verb (transitive):

To make difficult to accomplish; to frustrate, act as obstacle.

Examples:

"A drought hinders the growth of plants."
Hinder as a verb (ambitransitive):

To keep back; to delay or impede; to prevent.
Hinder as a verb (transitive, obsolete):

To cause harm.

Hinder as an adjective:

Of or belonging to that part or end which is in the rear or hind, or which follows.

Examples:

"the hinder end of a wagon"

"the hinder parts of a horse"
Hinder as an adjective: