Every word, A to Z.

The best, most favourable or desirable, especially under some restriction.

A tendency to expect the best, or at least, a favourable outcome.

Expecting the best in all possible ways.

The design and operation of a system or process to make it as good as possible in some defined sense.

To act optimistically or as an optimist.

The best or most favorable condition, or the greatest amount or degree possible under specific sets of comparable circumstances.

A person trained and skilled in examining and testing the eyes for defects, in order to prescribe corrective lenses or treatment.

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A shrine dedicated to some prophetic deity.

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Relating to the mouth.

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United States evangelist (born 1918)

A city, port, and province of Algeria.

An evergreen tree of the genus Citrus such as Citrus sinensis which yields oranges (the fruit).

An arboreal ape, characterised by its shaggy reddish-brown coat and long arms, of the genus Pongo, native to Borneo and Sumatra.

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A garden or an area of land for the cultivation of fruit or nut trees.

A plant of the orchid family (Orchidaceae), bearing unusually-shaped flowers of beautiful colours.

Abbreviation of order.

Neat and tidy; possessing order.

The second of the two terms by which a point is referred to, in a system of fixed rectilinear coordinate (Cartesian coordinate) axes…

A type of pasta, made with the thumb from a small disk, typically from Puglia.

A herb of the mint family, Origanum vulgare, having aromatic leaves.

A state in the Pacific Northwest region of the United States. Capital: Salem. Largest city: Portland.

Alternative form of Oryol: an oblast of Russia.

Alternative letter-case form of Oreo.

The larger part of an organism, composed of tissues that perform similar functions.

Of, relating to, or produced by an organization.

A sweet syrup made from sugar and almonds (or originally barley) and rose water or orange-flower water.