As adjectives the difference between zackly and mackly
is that zackly is alternative form of exactly while mackly is seemly; comely; good-looking.
As an interjection zackly
is alternative form of 'zackly.
As an adverb mackly is
evenly; aptly; easily.
mackly
English
Adverb
(en-adv)
Evenly; aptly; easily.
Moderately.
Adjective
(en-adj)
Seemly; comely; good-looking.