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

• Lexulous
• Wordscraper
• Wordosaur

n. Entreaty in favor of another, especially a prayer or petition to God in behalf of another.

n. Mediation in a dispute.

n. The act of intervening or mediating between two parties

n. A prayer to God on behalf of another person

n. The act of interceding; mediation; interposition between parties at variance, with a view to reconcilation; prayer, petition, or entreaty in favor of, or (less often) against, another or others.

n. The act of interceding; mediation; interposition between parties; solicitation or entreaty in behalf of, or sometimes against, a person or an action.

n. In liturgics, a petition or group of petitions for various orders of men and classes in the church, whether living or departed; a form of conjoint or mutual prayer for or with the living, the departed, saints, and angels.

n. the act of intervening (as to mediate a dispute, etc.)

n. a prayer to God on behalf of another person

"My first guess was that a useful intercession is one that preserves an important distinction in the language."

prayer    petition    orison   

great intercession    intercession of christ    intercession of saints   

intercessation of saints   

mediation   

Hessian    accession    aggression    compression    concession    confession    decompression    depression    digression    discretion   

interposition    mediation    supplication    atonement    importunity    thanksgiving    benediction    forgiveness    admonition    adoration