Difference between Comfortable and At Ease

COMFORTABLE vs AT EASE: NOUN

Free from stress or anxiety; at ease.
Producing feelings of ease or security.
Sufficient to provide financial security.
In fortunate circumstances financially; moderately rich
Free from stress or conducive to mental ease; having or affording peace of mind
Strong; vigorous; valiant.
Providing physical comfort.
Affording or imparting comfort or consolation; able to comfort; cheering.
In a condition of comfort; having comforts; not suffering or anxious; hence, contented; cheerful.
Free, or comparatively free, from pain or distress; -- used of a sick person.
Providing or experiencing physical well-being or relief (`comfy' is informal)
More than adequate
Sufficient to provide comfort
Serviceable; helpful.

Being in a state of ease or moderate enjoyment, as after sickness or pain; enjoying contentment and ease or repose.
Cheerful; disposed to enjoyment.
Attended with or producing comfort; free from or not causing disquiet of body or mind: as, to be in comfortable circumstances.
Moderately rich
Having or affording peace of mind
Having a wide margin
Giving comfort; cheering; affording help, ease, or consolation; serviceable.
Of things.
Synonyms Pleasant, agreeable, grateful.

At ease, Cosy, Rich, Wide, Prosperous, Sufficient, Soothing, Comforted, Homely, Homey, Cozy, Homelike, Easy, Snug, Comfy

Calm, Assuage, Ameliorate, Alleviate, Allay, Abate, Laid back, At rest, Unstrained, Comfortable, Easy, Easygoing, Relaxed, Degage, Mellow

At ease, Cosy, Rich, Wide, Prosperous, Sufficient, Soothing, Comforted, Homely, Homey, Cozy, Homelike, Easy, Snug, Comfy

Convenience, Comfort, Calm, Assuage, Ameliorate, Allay, Abate, Laid back, Unstrained, Comfortable, Easy, Easygoing, Relaxed, Degage, Mellow

Is my child comfortable around the proposed guardian?
The population is certainly not relaxed nor comfortable.
What scripting languages are you comfortable working with?
Who, I am sure, is kind and comfortable.
The bedroom should be cool, quiet and comfortable.
Comfortable seats, newish plane, great films to watch.
The bed was comfortable and even the sofa bed was comfortable.
If they feel comfortable at the end of the day most likely they will feel comfortable throughout the day.
The more comfortable parents are with such changes, the more comfortable their children will be.
This program is designed for individuals who are very comfortable with technology, comfortable coding and wish to develop apps professionally.