night-and-day
Completely different comparison
Night-and-day describes a dramatic, total contrast between two things—as different as darkness and light: The improvement in her health has been night-and-day.
Often used to emphasize transformation: His attitude before and after therapy was night-and-day different.
The phrase can also modify nouns: a night-and-day difference in quality.
Way things contrast
- transformationThorough change in form
- changeTo make different
- dramaticStrikingly expressive or sudden
- starkSevere and unadorned
opposite · comparison · shift · reversal · turnaround · before-and-after · improvement · distinction
Continuous, without interruption
- nonstopWithout pause or break
- constantFixed, unvarying quantity
- relentlessContinuing without pause
- ceaselessWithout interruption or end
perpetual · endless · tireless · uninterrupted · persistent · ongoing · incessant · steadfast
difference
Way things contrast
- transformationThorough change in form
- changeTo make different
- dramaticStrikingly expressive or sudden
stark · opposite · comparison · shift · reversal · turnaround · before-and-after · improvement · distinction · conversion
around-the-clock
Continuous, without interruption
- nonstopWithout pause or break
- constantFixed, unvarying quantity
- relentlessContinuing without pause
ceaseless · perpetual · endless · tireless · uninterrupted · persistent · ongoing · incessant · steadfast · round-the-clock
night-and-dayidentical
Exactly the same
indistinguishable · alike · similar · interchangeable · equivalent
night-and-dayimperceptible
Cannot be sensed
unnoticeable · negligible · subtle · marginal · gradual
night, nights, days, nightly, nighttime, daytime, midnight, midday, nightfall