learned vs lettered

learned and lettered both are adjectives.

Word	Noun	Adjective	Verb	Adverb
learned	No	Yes	No	No
lettered	No	Yes	No	No

As adjectives, learned and lettered are synonyms defined as:

learned and lettered: highly educated; having extensive information or understanding

Other synonyms of learned include knowing, knowledgeable, well-educated, well-read.

learned (adjective)	lettered (adjective)
established by conditioning or learning	highly educated; having extensive information or understanding
highly educated; having extensive information or understanding
having or showing profound knowledge