yard sale vs garage sale

yard sale and garage sale both are nouns.

Word	Noun	Adjective	Verb	Adverb
yard sale	Yes	No	No	No
garage sale	Yes	No	No	No

As nouns, yard sale and garage sale are synonyms defined as:

yard sale and garage sale: an outdoor sale of used personal or household items held on the seller's premises

yard sale (noun)	garage sale (noun)
an outdoor sale of used personal or household items held on the seller's premises	an outdoor sale of used personal or household items held on the seller's premises