trade wind vs prevailing wind

trade wind and prevailing wind both are nouns.

Word	Noun	Adjective	Verb	Adverb
trade wind	Yes	No	No	No
prevailing wind	Yes	No	No	No

As nouns, prevailing wind is a hypernym of trade wind; that is, prevailing wind is a word with a broader meaning than trade wind:

trade wind: steady winds blowing from east to west above and below the equator
prevailing wind: the predominant wind direction

trade wind (noun)	prevailing wind (noun)
steady winds blowing from east to west above and below the equator	the predominant wind direction