What's the difference between harmless and hurtless?

Harmless

Definition:

(a.) Free from harm; unhurt; as, to give bond to save another harmless.
(a.) Free from power or disposition to harm; innocent; inoffensive.

Example Sentences:

(1) For the mouthrinses containing 0.05% NaF the retention was about 0.4 mg F. This value is considered to be harmless.
(2) A harmless slice of Americana from the best fans in the world.
(3) Most hemangiomas are small, harmless birthmarks that appear soon after birth, proliferate for 8 to 18 months, and then slowly regress over the next 5 to 8 years, leaving normal or slightly blemished skin.
(4) Pelvic phleboliths are common and are generally considered to be harmless.
(5) It also intrigues me that the reaction of some women when challenged on this question so uncannily echoes the defence of sexist men in the 60s and 70s: come off it, love, it's just a bit of harmless fun.
(6) The high frequency of coxa magna in these patients and its possible role in the development of degenerative arthritis indicate that transient synovitis of the hip should not be considered a harmless disease until further epidemiologic studies are available.
(7) The activity and harmlessness of the virus was tested on sheep.
(8) The adults of the trematode occurring in the nasal sinuses and posterior nasal passage of the dolphins are considered as practically harmless for the host but thier eggs, aspirated deep into the bronchial tree, may initiate a foreign-body of inflammatory reaction in the lungs and continuous aspiration of such eggs may provoke a chronic pneumonia condition.
(9) Of all patients examined during that period for palpable breast tumors, 90 (=16.5%) were spared a breast operation thanks to fine-needle aspirations confirming the presence of harmless cysts only.
(10) They show once more that the treatment is harmless for the fetus.
(11) They are usually harmless, though they can cause an allergic reaction in a minority of people.
(12) Hepatic vascular exclusion (from 24 to 30mn) was harmless to the remnant liver and the kidneys.
(13) As regards post-therapeutic monitoring, MRI with gadolinium contrast injection is harmless and will make it possible to follow these patients regularly and to detect recurrences.
(14) CT, being a non-traumatic, harmless diagnostic method, improves the clinical evaluation of the patient and can facilitate the choice of the most suitable therapeutic modalities, as well as the follow-up of their results.
(15) Symptoms of bleeding, almost always harmless skin or mucosal bleeding, were found in 45% of patients with a history of intravenous drug abuse and in 18% of the homo- or bisexual men.
(16) A paradigm shift has occurred in which toxicity has been recognized at levels long held to be harmless.
(17) These results suggest that elevated glycine levels may be harmless in blood, but lethal in brain.
(18) It is superior to many other methods since it is non-invasive, harmless, and does not rely on the metabolism of a contrast agent.
(19) With equal reliability (96 percent), lumbar phlebography without catheterism is, by its simplicity and harmlessness and the absence of minor and major venous complications, preferable to phlebography by catheterism.
(20) The nature of the fistulous connection makes the release of the balloon inflated with silicone completely harmless.