Example : A rosy healthy baby.
Staying fit and healthy.

Example : A healthy economy.

Example : A healthy diet.
Clean healthy air.
Plenty of healthy sleep.
Healthy and normal outlets for youthful energy.
The salubrious mountain air and water.
Carrots are good for you.

Synonyms : good for you, salubrious

Example : Healthy scepticism.
A healthy fear of rattlesnakes.
The healthy attitude of French laws.
Healthy relations between labor and management.
An intelligent solution.
A sound approach to the problem.
Sound advice.
No sound explanation for his decision.

Synonyms : intelligent, level-headed, levelheaded, sound

Example : It cost a considerable amount.
A goodly amount.
Received a hefty bonus.
A respectable sum.
A tidy sum of money.
A sizable fortune.

Synonyms : goodish, goodly, hefty, respectable, sizable, sizeable, tidy