As adjectives the difference between waggiest and naggiest
is that waggiest is superlative of waggy while naggiest is superlative of naggy.
waggiest
English
Adjective
(head)
(waggy) waggy
English
Adjective
(er)
having a tendency to wag
Synonyms
*waggily naggiest
English
Adjective
(head)
(naggy)
naggy
English
Adjective
(er)
Prone to nag, irritable