clunky vs ungainly

clunky and ungainly both are adjectives.

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

As adjectives, clunky and ungainly are synonyms defined as:

Other synonyms of clunky include clumsy, gawky, unwieldy.

clunky (adjective)	ungainly (adjective)
making a clunking sound	lacking grace in movement or posture
lacking grace in movement or posture	difficult to handle or manage especially because of shape