ahead

As an adverb ahead

is in or to the front; in advance; onward.

As a noun axhead is

.

As adverbs the difference between above and ahead

is that above is directly overhead; vertically on top of while ahead is in or to the front; in advance; onward.

As a preposition above

is physically over; on top of; worn on top of, as clothing.

As an adjective above

is of heaven; heavenly.

As a noun above

is heaven.

As adverbs the difference between aheap and ahead

is that aheap is in a heap; huddled together while ahead is in or to the front; in advance; onward.

As a verb aread

is (obsolete) to soothsay, prophesy.

As an adverb ahead is

in or to the front; in advance; onward.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adverb ahead is

in or to the front; in advance; onward.

As adverbs the difference between ahead and afield

is that ahead is in or to the front; in advance; onward while afield is away (from the home or starting point, physical or conceptual); usually preceded by far (or farther, further).