An oxygen tent consists in a canopy placed over the head and shoulders or over the entire body of a patient to provide oxygen at a higher level than normal.
An oxymoron is a figure of speech that combines normally contradictory terms. They appear in a range of contexts, from inadvertent errors such as extremely average, to deliberate puns like same difference, to literary oxymorons that have been carefully crafted to reveal a paradox.
An understanding is perhaps better than an alliance, which may stereotype arrangements which cannot be regarded as permanent in view of the changing circumstances from day to day. Edward Grey
