adamantine

As a proper noun adam

is (label) adam (biblical figure).

As an adjective adamantine is

made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.

As adjectives the difference between unrelenting and adamantine

is that unrelenting is not relenting; having no pity; not being or becoming lenient, mild, gentle, or merciful; unyielding; inflexibly rigid; hard; stern; cruel while adamantine is made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.

As adjectives the difference between adamantium and adamantine

is that adamantium is made of adamantium while adamantine is made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.

As a noun adamantium

is a fictional metal that is indestructible or nearly so.

Solid is a related term of adamantine.

As an acronym solid

is (programming|object-oriented).

As an adjective adamantine is

made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.

As adjectives the difference between stiff and adamantine

is that stiff is of an object, rigid, hard to bend, inflexible while adamantine is made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.

As a noun stiff

is an average person, usually male, of no particular distinction, skill, or education, often a working stiff or lucky stiff.

As a verb stiff

is to fail to pay that which one owes (implicitly or explicitly) to another, especially by departing hastily.

As a noun orichalcum

is a valuable yellow metal known to the ancient Greeks and Romans; now sometimes interpreted as referring to a natural alloy of gold and copper, and sometimes treated as a mythical substance.

As an adjective adamantine is

made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.

Firm is a synonym of adamantine.

As adjectives the difference between firm and adamantine

is that firm is steadfast, secure, hard (in position) while adamantine is made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.

As a noun firm

is (uk|business) a business partnership; the name under which it trades.

As a verb firm

is to make firm or strong; fix securely.

As adjectives the difference between dense and adamantine

is that dense is having relatively high density while adamantine is made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.

As an adjective adamantine is

made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.

Adamantine is a related term of steely.

As adjectives the difference between adamantine and steely

is that adamantine is made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains while steely is having qualities resembling those of steel, especially hard and resolute.