severe vs serious

severe and serious both are adjectives.

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

As adjectives, severe and serious are synonyms defined as:

Other synonyms of severe include dangerous, grave, grievous, life-threatening.

severe (adjective)	serious (adjective)
causing fear or anxiety by threatening great harm	concerned with work or important matters rather than play or trivialities
intensely or extremely bad or unpleasant in degree or quality	completely lacking in playfulness
severely simple	causing fear or anxiety by threatening great harm
very strong or vigorous	requiring effort or concentration; complex and not easy to answer or solve
very bad in degree or extent	of great consequence
unsparing and uncompromising in discipline or judgment	appealing to the mind