Difference between Free and Costless

FREE vs COSTLESS: NOUN

Not affected or restricted by a given condition or circumstance.
Not bound by convention or the rules of form.
Not enslaved.
Governed by consent and possessing or granting civil liberties.
Not subject to a given condition; exempt.
Not literal or exact.
Costing nothing; gratuitous.
Publicly supported.
Unobstructed; clear.
Not subject to arbitrary interference by a government.
Not controlled by another country or political power; independent.
Not controlled by obligation or the will of another.
Not imprisoned or confined.
Costing nothing
Not fixed in position
Not taken up by scheduled activities
Not held in servitude
Not occupied or used.
Unconstrained or not chemically bound in a molecule or not fixed and capable of relatively unrestricted motion
Not literal
Able to act at will; not hampered; not under compulsion or restraint
Being a vowel in an open syllable, as the o in go.
Being a form, especially a morpheme, that can stand as an independent word, such as boat or bring.
Not bound, fastened, or attached.
Favorable.
Empty or unoccupied.
Frank or unguarded in expression or manner; open or outspoken.
Not occupied or in use
Given, made, or done of one's own accord; voluntary or spontaneous.
Immoderate in giving or spending; liberal or lavish.
Not chemically bound in a molecule.
Unconstrained; unconfined.
Involving no collisions or interactions.

In horticulture, abundantly blooming or fruiting; also, of profuse and rapid growth.
To make free; release from restraint or constraint; specifically, to release from bondage or from imprisonment: as, to free prisoners or slaves.
To rid, as from something obstructive or restrictive; clear; disentangle; disengage: with from or of: as, to free a man from debt, or the feet from fetters; to free the lungs of morbid matter; to free a ship from water by pumping it out.
To remove.
To clear from blame or stain; absolve from some charge; gain pardon for.
Completely wanting or lacking
Make (information) available for publication
In a free manner, in any sense of the adjective; freely; with freedom or liberty.
Grant freedom to
Free from confinement
Able to act at will
Not hampered
Not under compulsion or restraint
Release (gas or energy) as a result of a chemical reaction or physical decomposition
(idiom) (for free) Without charge.

Unconstrained, Unobstructed, Liberated, Rid, Exempt, Unshackled, Unbound, Costless, Unhampered, Available, Open, Unrestricted, Unfettered, Gratis, Complimentary

Unfettered, Unconstrained, Unlimited, Fungible, Feasible, Obtainable, Inexpensive, Cheap, Riskless, Pro bono, Unpaid, Complimentary, Gratis, Free, Gratuitous

Unconstrained, Unobstructed, Liberated, Rid, Exempt, Unshackled, Unbound, Costless, Unhampered, Available, Open, Unrestricted, Unfettered, Gratis, Complimentary

Unfettered, Unconstrained, Unlimited, Fungible, Feasible, Obtainable, Inexpensive, Cheap, Riskless, Pro bono, Unpaid, Complimentary, Gratis, Free, Gratuitous

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