buy in vs stock up

buy in and stock up both are verbs.

Word	Noun	Adjective	Verb	Adverb
buy in	No	No	Yes	No
stock up	No	No	Yes	No

As verbs, buy in and stock up are synonyms defined as:

buy in and stock up: amass so as to keep for future use or sale or for a particular occasion or use

Other synonyms of buy in include stock.

buy in (verb)	stock up (verb)
amass so as to keep for future use or sale or for a particular occasion or use	amass so as to keep for future use or sale or for a particular occasion or use