strengthen
corroborate
inbuild
fortify
beef up
confirm
fresh
thicken
brace up
freshen
harden
strengthy
build up
reassert
indurate
strengthenable
reenforce
reinforce
strengthening
reinforceability
restrengthen
build
work up
ramp up
horsepower
muscle
strengthfully
fortified
muscle up
muscularity
reinforceable
get up
steel
flex
buttress
instrengthen
strengtheningly
lower the boom
inspirit
boostable
roborative
consolidate
gather steam
upsurge
potent
enforce
escalate
foison
intensitive
birr
lift
fore-strength
heighten
nerve
strongful
reinforcible
tonify
intensity
wald
boost
invigorate
antistrong
reinvigorate
augmented
strongness
oomph
intensifying
strength
soup up
hot up
hop up
fizzen
roborant
vitalise
corroboration
stour
muscly
elevatory
pound out
robust
reach
whoop-ass
accomplish
attain
achieve
invigorating
well-matched
strengthy
strengthenable
fortified
reinforceable
boostable
roborative
potent
intensitive
strongful
reinforcible
antistrong
augmented
intensifying
roborant
stour
muscly
elevatory
robust
invigorating
well-matched
strengthfully
strengtheningly
strengthening
reinforceability
horsepower
muscle
muscularity
foison
birr
fore-strength
intensity
wald
strongness
oomph
strength
fizzen
corroboration
whoop-ass
strengthen
corroborate
inbuild
fortify
beef up
confirm
fresh
thicken
brace up
freshen
harden
build up
reassert
indurate
reenforce
reinforce
restrengthen
build
work up
ramp up
muscle up
get up
steel
flex
buttress
instrengthen
lower the boom
inspirit
consolidate
gather steam
upsurge
enforce
escalate
lift
heighten
nerve
tonify
boost
invigorate
reinvigorate
soup up
hot up
hop up
vitalise
pound out
reach
accomplish
attain
achieve
English words for 'To make strong or stronger; to add strength to; to increase the strength of; to fortify.'
As you may have noticed, above you will find words for "To make strong or stronger; to add strength to; to increase the strength of; to fortify.". Hover the mouse over the word you'd like to know more about to view its definition. Click 
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Synonym of downright
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a Russian river in Siberia
faithful wife
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Having a single target
sometimes placed in genus Habenaria
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up and down
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