painful vs dreadful

painful and dreadful both are adjectives.

Word	Noun	Adjective	Verb	Adverb
painful	No	Yes	No	No
dreadful	No	Yes	No	No

As adjectives, painful and dreadful are synonyms defined as:

Other synonyms of painful include abominable, atrocious, awful, terrible, unspeakable.

painful (adjective)	dreadful (adjective)
causing physical or psychological pain	causing fear or dread or terror
exceptionally bad or displeasing	exceptionally bad or displeasing
causing physical discomfort	extremely disagreeable and unpleasant
causing misery or pain or distress