What is the only English word that is spelled alphabetically?

The Word 'alphabetically' is the the only Word that is spelled 'alphabetically.'

No other Words are spelled that way. (That is the riddle answer.)

On the other hand, many Words are spelled with all their letters in alphabetical order.

Some examples:

3 letters: beg, box, few, hip, low, mop, not

4 letters: abet, bell, chin, clip, clop, drip, drop, felt, flux, gill, gilt, hill, lost, lust, most, must

5 letters: abbey, abhor, abort, begin, dotty, films, first, forty, ghost

6 letters: almost, biopsy, chintz

The longest Word that has all its letters in alphabetical order is aegilops* (8 letters).

Aegilops is ...

(a) an eye ulcer, or

(b) the botanical name for a specific type of oat grass.

Because 'aegilops' is a medical or scientific term that has limited usage in the everyday vocabulary of most people, the Word 'aegilops' is not listed in every dictionary.

*See Related links below.