severe vs terrible

severe and terrible both are adjectives.

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

As adjectives, severe and terrible are synonyms defined as:

severe and terrible: intensely or extremely bad or unpleasant in degree or quality

Other synonyms of severe include wicked.

severe (adjective)	terrible (adjective)
causing fear or anxiety by threatening great harm	causing fear or dread or terror
intensely or extremely bad or unpleasant in degree or quality	extreme in degree or extent or amount or impact
severely simple	intensely or extremely bad or unpleasant in degree or quality
very strong or vigorous	exceptionally bad or displeasing
very bad in degree or extent
unsparing and uncompromising in discipline or judgment