As adjectives the difference between gigglier and jigglier
is that gigglier is (giggly) while jigglier is (jiggly).
gigglier
English
Adjective
(head)
(giggly)
giggly
English
Adjective
(er)
Prone to giggling.
jigglier
English
Adjective
(head)
(jiggly)
jiggly
English
Adjective
(er)
that jiggles