aa

As nouns the difference between aa and fuel

is that aa is (l) while fuel is substance consumed to provide energy through combustion, or through chemical or nuclear reaction.

As a verb fuel is

to provide with fuel.

As nouns the difference between double and aa

is that double is while aa is (l).

As a letter e

is the letter e with a circumflex.

As a noun aa is

(l).

As nouns the difference between joe and aa

is that joe is (informal) a male; a guy; a fellow or joe can be (chiefly|us|informal) coffee while aa is (l).

As a noun aa

is (l).

As an adjective undefined is

lacking a definition or value.

As nouns the difference between aa and aardvark

is that aa is (l) while aardvark is the nocturnal, insectivorous, burrowing, mammal.

As nouns the difference between aa and tesla

is that aa is (l) while tesla is tesla.