boomer

• POS: Noun
• HYPHEN: boom=er

CIDE DICTIONARY

boomer, n. 

•  One who, or that which, booms.  [1913 Webster]
•  A North American rodent, so named because it is said to make a booming noise. See Sewellel.  [1913 Webster]
•  A large male kangaroo.  [1913 Webster]
•  One who works up a “boom”.  [1913 Webster]

OXFORD DICTIONARY

boomer, n.
1 a large male kangaroo.
2 a N. American mountain beaver, Aplodontia rufa.
3 a large wave.

ROGET THESAURUS

boomer

Rashness

N rashness, temerity, want of caution, imprudence, indiscretion, overconfidence, presumption, audacity, precipitancy, precipitation, impetuosity, levity, foolhardihood, foolhardiness, heedlessness, thoughtlessness, carelessness, desperation, Quixotism, knight-errantry, fire eating, gaming, gambling, blind bargain, leap in the dark, leap of faith, fool's paradise, too many eggs in one basket, desperado, rashling, madcap, daredevil, Hotspur, fire eater, bully, bravo, Hector, scapegrace, enfant perdu, Don Quixote, knight-errant, Icarus, adventurer, gambler, gamester, dynamitard, boomer, rash, incautious, indiscreet, imprudent, improvident, temerarious, uncalculating, heedless, careless, without ballast, heels over head, head over heels, giddy, wanton, reckless, wild, madcap, desperate, devil-may-care, hot-blooded, hotheaded, hotbrained, headlong, headstrong, breakneck, foolhardy, harebrained, precipitate, impulsive, overconfident, overweening, venturesome, venturous, adventurous, Quixotic, fire eating, cavalier, janty, jaunty, free and easy, off one's guard, post haste, a corps perdu, hand over head, tete baissee, headforemost, happen what may, come what may, neck or nothing, the devil being in one, non semper temeritas est felix, paucis temeritas est bono multis malo.