Antonyms

1. heavier-than-air

adjective. relating to an aircraft heavier than the air it displaces.

Antonyms

  • effortless

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2. heavier-than-air_craft

noun. a non-buoyant aircraft that requires a source of power to hold it aloft and to propel it.

Synonyms

  • ornithopter
  • aeroplane
  • sailplane
  • whirlybird
  • pilotless aircraft
  • orthopter
  • aircraft
  • chopper
  • helicopter
  • gyroplane
  • airplane
  • glider
  • autogiro
  • radio-controlled aircraft
  • autogyro
  • military plane
  • eggbeater
  • plane
  • warplane

Antonyms

  • roughen

3. lighter-than-air

adjective. relating to a balloon or other aircraft that flies because it weighs less than the air it displaces.

Antonyms

  • dark

4. air

noun. ['ˈɛr'] a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of.

Synonyms

  • Kr
  • Ar
  • breath
  • Xe
  • nitrogen
  • atomic number 54
  • atomic number 10
  • atomic number 8
  • liquid air
  • N
  • wind
  • air current
  • neon
  • atomic number 18
  • xenon
  • gas
  • hot air
  • current of air
  • krypton
  • Ne
  • oxygen
  • atomic number 7
  • O
  • atomic number 36

Antonyms

  • unstrain
  • polyphonic music
  • monophony
  • polyphony

Etymology

  • air (Middle English (1100-1500))
  • aeir (Anglo-Norman)

5. air

noun. ['ˈɛr'] the region above the ground.

Synonyms

  • region

Antonyms

  • attach
  • stay

Etymology

  • air (Middle English (1100-1500))
  • aeir (Anglo-Norman)

6. air

noun. ['ˈɛr'] a distinctive but intangible quality surrounding a person or thing.

Synonyms

  • vibe
  • quality
  • atmosphere
  • vibration
  • mystique
  • aura

Antonyms

  • leaded gasoline
  • unleaded gasoline
  • defend
  • untune

Etymology

  • air (Middle English (1100-1500))
  • aeir (Anglo-Norman)

7. air

noun. ['ˈɛr'] a slight wind (usually refreshing).

Synonyms

  • zephyr
  • light air
  • sea breeze
  • air current
  • current of air
  • breath
  • fresh breeze
  • gentle breeze
  • breeze
  • moderate breeze
  • light breeze
  • wind
  • strong breeze

Antonyms

  • arrive
  • stand still
  • wholly
  • conception

Etymology

  • air (Middle English (1100-1500))
  • aeir (Anglo-Norman)

8. air

noun. ['ˈɛr'] the mass of air surrounding the Earth.

Synonyms

  • part
  • airspace
  • Earth
  • globe
  • atmosphere
  • world
  • ionosphere
  • earth
  • air space

Antonyms

  • end
  • misconception
  • beginning
  • join

Etymology

  • air (Middle English (1100-1500))
  • aeir (Anglo-Norman)

9. air

verb. ['ˈɛr'] expose to fresh air.

Synonyms

  • air out
  • aerate

Antonyms

  • confine
  • spell
  • birth

Etymology

  • air (Middle English (1100-1500))
  • aeir (Anglo-Norman)

10. air

verb. ['ˈɛr'] make public.

Synonyms

  • bulletin
  • circularize
  • spread
  • pass around
  • release
  • publicize
  • circularise
  • put out
  • bring out
  • publicise
  • issue
  • hype
  • propagate
  • broadcast
  • bare
  • circulate
  • publish
  • beam
  • distribute
  • send
  • tell
  • diffuse
  • transmit
  • disperse

Antonyms

  • gather
  • centralization
  • fold
  • cross

Etymology

  • air (Middle English (1100-1500))
  • aeir (Anglo-Norman)

Example sentences of the word heavier-than-air


1. Noun Phrase
PVC gas is also heavier than air, causing it to settle and remain for days if the room is not properly ventilated.

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