half-witted vs feebleminded

half-witted and feebleminded both are adjectives.

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

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

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

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