As adjectives the difference between punkiest and junkiest
is that punkiest is superlative of punky while junkiest is superlative of junky.
punkiest
English
Adjective
(head)
(punky)
punky
English
Adjective
(er)
(Geology) Of or pertaining to punk (touchwood) - soft or rotted.
Of or pertaining to the punk subculture.
Noun
(punkies)
junkiest
English
Adjective
(head)
(junky)
junky
English
Adjective
(er)
Resembling or characteristic of junk; cheap, worthless, or of low quality.
Noun
(junkies)
(slang, pejorative)