clunky vs unwieldy

clunky and unwieldy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
clunky	No	Yes	No	No
unwieldy	No	Yes	No	No

As adjectives, clunky and unwieldy are synonyms defined as:

Other synonyms of clunky include clumsy, gawky, ungainly.

clunky (adjective)	unwieldy (adjective)
making a clunking sound	difficult to use or handle or manage because of size or weight or shape
lacking grace in movement or posture	lacking grace in movement or posture
	difficult to work or manipulate