The difference between Gridiron and Gridiron football

Gridiron as a noun:

An instrument of torture on which people were secured before being burned by fire.

Gridiron as a noun:

An iron rack or grate used for broiling meat and fish over coals.

Gridiron as a noun:

Any object resembling the rack or grate.

Gridiron as a noun (nautical):

An openwork frame on which vessels are placed for examination, cleaning, and repairs.

Gridiron as a noun (American football):

The field on which American football is played.

Gridiron as a noun (uncountable):

American football.

Gridiron as a noun (uncountable, Australia, and, New Zealand):

A generic term for American and Canadian football, particularly when used to distinguish from other codes of football.

Gridiron as a verb:

To mark or cover with lines; to crisscross.

Gridiron as a verb (NZ, historical):

To purchase land so that the remaining adjacent sections are smaller than the minimum area purchasable as freehold, thus excluding potential freeholders.

Gridiron football as a noun:

collectively, Canadian football and American football