“nauseous” vs. “nauseated”

Traditionally, "nauseous" describes something that causes sickness, while "nauseated" describes a person feeling sick — though "nauseous" to mean "feeling sick" is now widely accepted in everyday usage despite some traditionalists' objections.

The real distinction

Traditional usage guides maintain a strict distinction: something "nauseous" causes sickness (a nauseous smell), while a person who feels sick is "nauseated" (I feel nauseated), not "nauseous" (which, under this traditional rule, would describe the person as causing nausea in others, a nonsensical or unintentionally comic claim). However, this distinction has largely eroded in everyday American English, where "I feel nauseous" is now the overwhelmingly common way to express feeling sick, and major dictionaries have long since added this sense as standard, reflecting how thoroughly the popular usage has displaced the traditional one. Writers aiming for the most careful, traditional, or formal register — some copy editors, some style guides, and some older readers — will still expect "nauseated" to describe a person's own feeling of sickness and "nauseous" to describe the external cause, and using "nauseous" to mean "feeling sick" may draw a correction from a stickler, even though virtually everyone will understand the intended meaning either way. For writers who want to sidestep any risk of criticism entirely, using "nauseated" for personal sickness and "nauseating" (a more common synonym for the traditional "nauseous") for something that causes sickness avoids the controversy altogether while remaining perfectly natural and unambiguous.

Examples with “nauseous”

• The nauseous fumes from the paint forced everyone outside.
• The rocking boat left several passengers feeling nauseous.
• A nauseous odor drifted from the dumpster behind the restaurant.
• The chemical spill released a nauseous gas into the air.
• The carnival ride's spinning motion made her feel nauseous.
• A nauseous stench filled the abandoned building.
• The medication's side effects can include a nauseous sensation.
• The bumpy flight left many travelers feeling nauseous.
• The overpowering perfume was almost nauseous in its intensity.
• The spoiled milk gave off a distinctly nauseous smell.
• The nauseous smell of rotting garbage lingered for days.
• Passengers described the fumes as almost unbearably nauseous.
• The nauseous stench from the sewer backup cleared the block.

Examples with “nauseated”

• She felt nauseated after the long, winding car ride.
• The medication sometimes leaves patients feeling nauseated.
• He became nauseated after eating the questionable seafood.
• The turbulence left several passengers nauseated and pale.
• She was nauseated by the graphic images in the documentary.
• The spinning carnival ride left the children nauseated.
• He felt nauseated the morning after the late-night dinner.
• The strong chemical smell made her nauseated within minutes.
• The rough sea conditions left the sailors nauseated for hours.
• She reported feeling nauseated and dizzy to the nurse.
• He felt increasingly nauseated as the boat rocked harder.
• He grew nauseated after the third loop on the roller coaster.
• She felt nauseated whenever she smelled the hospital's antiseptic.
• Reading in the car always leaves her feeling nauseated.
• The spinning ride left several children nauseated within minutes.

Memory trick

Remember the traditional rule with this test: something "nauseous" makes others sick, while a person who feels sick is "nauseated." Picture a nauseous smell radiating outward, causing sickness, versus a nauseated stomach turning inward on itself — though in casual conversation today, most people simply say "I feel nauseous" and are perfectly understood. As a final safeguard, when in doubt, choose "nauseated" for your own feelings and "nauseating" for something disgusting, sidestepping the entire debate over "nauseous" altogether.