Synonyms for substantial decline

Synonyms for substantial

significant (meaningful, appreciable, dramatic >>)
considerable
sizeable
large (major, big, real >>)
important
great
strong
hefty
material
much
respectable
thorough

See all synonyms for substantial

Synonyms for decline

fall (drop, go down, drop off >>)
reduction (loss, lower, diminution >>)
deterioration (degradation, worsening, depletion >>)
slump (depression, downturn, recession >>)
diminish (shrink, worsen, dwindle >>)
refuse
decay (collapse, breakdown, crash >>)
demise
plummet (falling, falls, descent >>)
dip
plunge
wane
ebb
declension

See all synonyms for decline