1. (verb) make strong or stronger

• beef up
• fortify

2. (verb) give a healthy elasticity to

• tone
• tone up

1. (verb) make strong or stronger

• alter
• change
• modify

2. (verb) gain strength

• change

3. (verb) give a healthy elasticity to

• exercise
• work out

1. (verb) make strong or stronger

• batten
• batten
• batten down
• secure
• brace
• stabilise
• stabilize
• steady
• brace up
• undergird
• buttress
• confirm
• reenforce
• reinforce
• restrengthen
• ruggedise
• ruggedize
• substantiate
• vitalise
• vitalize

2. (verb) gain strength

• back
• consolidate
• proof
• sandbag
• toughen

1. (verb) make strong or stronger

• fortification
• fortification
• reinforcement
• strengthener
• strengthening

2. (verb) gain strength

• strengthening

3. (verb) give a healthy elasticity to

• tone
• tonicity
• tonus

1. (verb) make strong or stronger

• weaken

2. (verb) gain strength

• weaken