solemn vs serious

solemn and serious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
solemn	No	Yes	No	No
serious	No	Yes	No	No

solemn (adjective)	serious (adjective)
dignified and somber in manner or character and committed to keeping promises	concerned with work or important matters rather than play or trivialities
characterized by a firm and humorless belief in the validity of your opinions	completely lacking in playfulness
	causing fear or anxiety by threatening great harm
	requiring effort or concentration; complex and not easy to answer or solve
	of great consequence
	appealing to the mind