second-hand store vs thriftshop

second-hand store and thriftshop both are nouns.

Word	Noun	Adjective	Verb	Adverb
second-hand store	Yes	No	No	No
thriftshop	Yes	No	No	No

As nouns, second-hand store and thriftshop are synonyms defined as:

second-hand store and thriftshop: a shop that sells secondhand goods at reduced prices

second-hand store (noun)	thriftshop (noun)
a shop that sells secondhand goods at reduced prices	a shop that sells secondhand goods at reduced prices