joined vs linked

joined and linked both are adjectives.

Word	Noun	Adjective	Verb	Adverb
joined	No	Yes	No	No
linked	No	Yes	No	No

As adjectives, joined and linked are synonyms defined as:

joined and linked: connected by a link, as railway cars or trailer trucks

Other synonyms of joined include coupled.

joined (adjective)	linked (adjective)
connected by a link, as railway cars or trailer trucks	connected by a link, as railway cars or trailer trucks
of or relating to two people who are married to each other