А в словарь заглянуть?

As an adversative particle expresses that relation of two opposed facts or circumstances (actual or hypothetical) in which the one is inadequate to prevent the other, and therefore both concur, contrary to what might be expected. Also used as an intensive after a question or emphatic statement.

As a conjunctive when introducing a subordinate clause expressing a fact, or with ellipsis in the subordinate clause, or introducing a subordinate clause expressing a supposition or possibility, or introducing an additional statement restricting or modifying the preceding.

Что касается although: All though was originally more emphatic than though, but by 1400 it was practically only a variant of it, and all having thus lost its independent force, the phrase was written as one word.

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Спасибо.
Я заглянула в cambridge онлайн, а этот какой?

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Oxford English Dictionary

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