old-line vs established

old-line and established both are adjectives.

Word	Noun	Adjective	Verb	Adverb
old-line	No	Yes	No	No
established	No	Yes	No	No

old-line (adjective)	established (adjective)
long-established	brought about or set up or accepted; especially long established
adhering to conservative or reactionary principles	introduced from another region and persisting without cultivation
	conforming with accepted standards
	shown to be valid beyond a reasonable doubt
	settled securely and unconditionally