auction block vs platform

auction block and platform both are nouns.

Word	Noun	Adjective	Verb	Adverb
auction block	Yes	No	No	No
platform	Yes	No	No	No

As nouns, platform is a hypernym of auction block; that is, platform is a word with a broader meaning than auction block:

auction block (noun)	platform (noun)
a platform from which an auctioneer sells	a raised horizontal surface
	any military structure or vehicle bearing weapons
	a woman's shoe with a very high thick sole
	the combination of a particular computer and a particular operating system
	a long, flat raised structure of a railway station, where people get on and off of trains
	a document stating the aims and principles of a political party