terrible vs severe

terrible and severe both are adjectives.

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

As adjectives, terrible and severe are synonyms defined as:

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

Other synonyms of terrible include wicked.

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