languor vs current of air

languor and current of air both are nouns.

Word	Noun	Adjective	Verb	Adverb
languor	Yes	No	No	No
current of air	Yes	No	No	No

As nouns, current of air is a hypernym of languor; that is, current of air is a word with a broader meaning than languor:

languor: oppressively still air
current of air: air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure

Other hypernyms of languor include air current, wind.

languor (noun)	current of air (noun)
inactivity; showing an unusual lack of energy	air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure
a relaxed comfortable feeling
a feeling of lack of interest or energy
oppressively still air