1. (verb) make more intense, stronger, or more marked

• compound
• heighten
• intensify

2. (verb) become more intense

• intensify

3. (verb) become deeper in tone

• change

1. (verb) make more intense, stronger, or more marked

• amplify
• enhance
• heighten
• raise
• fan
• heat up
• hot up
• screw up
• heighten
• sharpen
• sharpen

2. (verb) become more intense

• accelerate
• quicken
• speed
• speed up
• break open
• burst out
• erupt
• flare
• flare up
• irrupt
• build
• condense
• redouble
• sharpen

1. (verb) make more intense, stronger, or more marked

• increase

2. (verb) become more intense

• increase

3. (verb) make deeper

• enlarge

4. (verb) become deeper in tone

• change

1. (verb) make more intense, stronger, or more marked

• intensification
• intensifier
• intensive
• intensity
• intensiveness

2. (verb) become more intense

• intensification
• intensity
• intensiveness

3. (verb) make deeper

• deepening