vigor (n.)
- amperage
- animation
- authority
- bang
- beef
- bite
- bounce
- brio
- briskness
- capacity
- charge
- charisma
- clout
- cogency
- compulsion
- decisiveness
- dint
- drive
- duress
- dynamism
- eagerness
- effect
- effectiveness
- effectuality
- elan
- endurance
- energy
- enthusiasm
- ergal
- esprit
- exuberance
- force
- forcefulness
- fortitude
- friskiness
- frolicsomeness
- gaiety
- gayness
- get-up-and-go
- getup
- go
- gusto
- guts
- gutsiness
- haleness
- hardiness
- healthiness
- heartiness
- impressiveness
- incisiveness
- influence
- intensity
- life
- liveliness
- longevity
- lustiness
- mana
- manliness
- mettle
- mettlesomeness
- might
- mightiness
- moxie
- muscle
- muscularity
- nervousness
- obstinacy
- oomph
- pep
- pith
- pizzazz
- playfulness
- poignancy
- poop
- potence
- potency
- potentiality
- power
- powerfulness
- prepotency
- productiveness
- productivity
- puissance
- pull
- punch
- push
- resilience
- robustness
- ruggedness
- sinew
- skittishness
- snap
- soundness
- spirit
- spiritedness
- spirits
- sportiveness
- sprightliness
- spunk
- stalwartness
- stamina
- starch
- steam
- stoutness
- strength
- strenuousness
- sturdiness
- superiority
- superpower
- toughness
- trenchancy
- validity
- vehemence
- verve
- vim
- virility
- virtue
- virulence
- vitality
- vivacity
- wattage
- weight
- zest
- zestfulness
- zing
- zip
