This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A union of interests, purposes, or sympathies among members of a group; fellowship of responsibilities and interests: "A downtrodden class ... will never be able to make an effective protest until it achieves solidarity” ( H.G. Wells).

n. A bond of unity between individuals, united around a common goal or against a common enemy, such as the unifying principle that defines the labor movement.

n. Willingness to give psychological and/or material support when another person is in a difficult position or needs affection.

n. An entire union or consolidation of interests and responsibilities; fellowship; community.

n. Mutual responsibility existing between two or more persons; communion of interests and responsibilities.

n. a union of interests or purposes or sympathies among members of a group

"But the power and faith and good will of that crowd, and all of us watching in solidarity, is what is transforming this country."

commonality    commonness   

solid    solidus    solidary   

fellowship    community    unity   

Verity    barbarity    celerity    clarity    dexterity    disparity    familiarity    hilarity    irregularity    parity   

brotherhood    unity    equality    well-being    comradeship    fellowship    goodwill    coöperation    oneness    loyalty