Antonym: heater. Similar words: water cooler, tomfoolery, cool, cool down, cool it, cool off, coolly, coolant. Meaning: ['kuːlə(r)] 
n. 1. a refrigerator for cooling liquids 2. an iced drink especially white wine and fruit juice 3. a cell for violent prisoners.
n. 1. a refrigerator for cooling liquids 2. an iced drink especially white wine and fruit juice 3. a cell for violent prisoners. 
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(1) Cooler weather is forecast for the weekend.
(2) Eagles breed during the cooler months of the year.
(3) Stay in the shade it's cooler.
(4) As they climbed higher, the air became cooler.
(5) Things are cooler and more damp as we descend to the cellar.
(6) I wish I'd worn something cooler - I'm boiling.
(7) The food in the cooler can prevent spoiling.
(8) Subtropical regions are cooler than equatorial regions.
(9) It will be cooler when the sun has set.
(10) We've brought a cooler full of beer with us.
(11) It's late summer; soon the days will be cooler.
(12) Metals contract as they get cooler.
(13) Natural fibres such as cotton tend to be cooler.
(14) The climate is cooler in the east of the country.
(15) It was getting cooler as the sun sank below the horizon.
(16) They took a cooler full of drinks to the beach. Sentencedict.com
(17) Next week will be fine but a little cooler.
(18) It's much cooler over here in the shade.
(19) The afternoon will be overcast with cooler temperatures.
(20) It gets much cooler in the evenings.
(21) The house looked cooler, clearer, its angles sharper and shadows blacker in the high summer sunshine.
(22) It was a lot cooler and windier than earlier in the week.
(23) With cooler air, more cloud, and so less sunshine, even grass grows less well than on the lowlands.
(24) Also, of course, the climate becomes steadily cooler from the equator to the poles.
(25) Meetings around the water cooler are encouraged rather than discouraged.
(26) Mike went to fetch a bottle of wine from the cooler.
(27) Three out of four Americans watched Roots, and then the next day could talk about race relations at the water cooler.
(28) At first it was very hot, but then it got cooler.
(29) How do you think that would play around the old water cooler?
(30) As the sun shrinks it rotates faster, and flings off its outer, much cooler shell when it reaches escape velocity.
More similar words: water cooler, tomfoolery, cool, cool down, cool it, cool off, coolly, coolant, coolness, woolen, boolean, as cool as a cucumber, gaoler, choler, tolerate, tolerant, choleric, cajolery, tolerance, tolerably, tolerable, wholesaler, intolerant, toleration, intolerable, intolerance, coo, coop, coot, cook.