loggerheaded vs duncical

loggerheaded and duncical both are adjectives.

Word	Noun	Adjective	Verb	Adverb
loggerheaded	No	Yes	No	No
duncical	No	Yes	No	No

As adjectives, loggerheaded and duncical are synonyms defined as:

Other synonyms of loggerheaded include blockheaded, boneheaded, duncish, fatheaded, thick-skulled, thick, thickheaded, wooden-headed.

loggerheaded (adjective)	duncical (adjective)
(used informally) stupid	(used informally) stupid