buyers' market vs buyer's market

buyers' market and buyer's market both are nouns.

Word	Noun	Adjective	Verb	Adverb
buyers' market	Yes	No	No	No
buyer's market	Yes	No	No	No

As nouns, buyers' market and buyer's market are synonyms defined as:

buyers' market and buyer's market: a market in which more people want to sell than want to buy

Other synonyms of buyers' market include soft market.

buyers' market (noun)	buyer's market (noun)
a market in which more people want to sell than want to buy	a market in which more people want to sell than want to buy