slow-witted vs feebleminded

slow-witted and feebleminded both are adjectives.

Word	Noun	Adjective	Verb	Adverb
slow-witted	No	Yes	No	No
feebleminded	No	Yes	No	No

As adjectives, slow-witted and feebleminded are synonyms defined as:

Other synonyms of slow-witted include backward, half-witted.

slow-witted (adjective)	feebleminded (adjective)
retarded in intellectual development	retarded in intellectual development