1. (noun) the quality of being valid and rigorous

• cogency
• rigor
• rigour

2. (noun) the quality of having legal force or effectiveness

• validness

3. (noun) the property of being strong and healthy in constitution

• hardiness
• lustiness
• robustness

1. (noun) the quality of being valid and rigorous

• believability
• credibility
• credibleness

2. (noun) the quality of having legal force or effectiveness

• legality

3. (noun) the property of being strong and healthy in constitution

• strength

1. (noun) the quality of having legal force or effectiveness

• effect
• force

1. (noun) the quality of being valid and rigorous

• rigorous
• strict
• valid

2. (noun) the quality of having legal force or effectiveness

• valid
• valid
• valid

3. (noun) the property of being strong and healthy in constitution

• full-blooded
• hearty
• lusty
• red-blooded
• hardy
• stalwart
• stout
• sturdy
• robust