witless vs soft-witted

witless and soft-witted both are adjectives.

Word	Noun	Adjective	Verb	Adverb
witless	No	Yes	No	No
soft-witted	No	Yes	No	No

As adjectives, witless and soft-witted are synonyms defined as:

witless and soft-witted: (of especially persons) lacking sense or understanding or judgment

Other synonyms of witless include nitwitted, senseless.

witless (adjective)	soft-witted (adjective)
(used as complement) to the utmost degree	(of especially persons) lacking sense or understanding or judgment
(of especially persons) lacking sense or understanding or judgment