thoughtful vs serious-minded

thoughtful and serious-minded both are adjectives.

Word	Noun	Adjective	Verb	Adverb
thoughtful	No	Yes	No	No
serious-minded	No	Yes	No	No

As adjectives, thoughtful and serious-minded are synonyms defined as:

thoughtful (adjective)	serious-minded (adjective)
exhibiting or characterized by careful thought	characterized by solemn, sincere manner
taking heed; giving close and thoughtful attention
considerate of the feelings or well-being of others
having intellectual depth
characterized by solemn, sincere manner