As nouns the difference between snapback and slapback
is that snapback is the reimposition of an earlier and usually higher tariff while slapback is a kind of doubling echo with relatively long delay between repetitions of the sound, so that the individual echoes can be perceived.
snapback
English
Noun
(
en noun)
The reimposition of an earlier and usually higher tariff.
(slang) An adjustable, flat-brimmed baseball cap with snap fasteners on the back.
slapback
English
Noun
(
en noun)
A kind of doubling echo with relatively long delay between repetitions of the sound, so that the individual echoes can be perceived.