1. (noun) active strength of body or mind

• heartiness
• vigor
• vigour

2. (noun) the activeness of an energetic personality

• oomph
• pizzaz
• pizzazz
• zing

1. (noun) any of the various theories or doctrines or philosophical systems that attempt to explain the phenomena of the universe in terms of some immanent force or energy

• doctrine
• ism
• philosophical system
• philosophy
• school of thought

2. (noun) active strength of body or mind

• strength

3. (noun) the activeness of an energetic personality

• activeness
• activity

1. (noun) active strength of body or mind

• dynamic
• dynamical
• full-blooded
• hearty
• lusty
• red-blooded
• hearty
• vigorous
• vigorous

2. (noun) the activeness of an energetic personality

• dynamic
• dynamical