double strength
- extraAdditional, beyond necessary
- potentHaving great effect
- concentratedGathered or intensified
- fortifiedMade more resistant
- heavy-dutyBuilt for hard use
reinforced · powerful · intense · robust · amplified · supercharged · boosted · maximum · industrial · espresso · caffeine · dose · tonic · medicine · capsule · brew · punch · kick
concentration/potency
double strengthdiluted
Made weaker by adding liquid
weakened · watered down · weak · dilute · watered-down
power/force
double strengthweak
Lacking power or force
feeble · diminished · reduced · underpowered · low power