(organic chemistry, dated) acetaldehyde.

Eagerness; liveliness; enthusiasm. / Promptness; speed.

One who practices alchemy. / One who blends material or substances in the nature or supposed nature of alchemy.

(architecture) A small recessed area set off from a larger room. / A shady retreat.

A male given name from Ancient Greek, most famously held by Alexander the Great. / A Scottish surname originating as a patronymic, anglicized from Scottish Gaelic Mac Alasdair (“son of Alexander”).

Alternative letter-case form of alexander

(archaic) A woman who keeps an alehouse.

A migrating North American fish, Alosa pseudoharengus. / Any of several species similar in appearance.

A summons to arms, as on the approach of an enemy. / Any sound or information intended to give notice of approaching danger; a warning sound to arouse attention; a warning of danger.

(transitive) To call to arms for defense / (transitive) To give (someone) notice of approaching danger / (transitive) To rouse to vigilance and action; to put on the alert.