Profusion, n.
Etymology: [L. profusio: cf. F. profusion.]
1. The act of one who is profuse; a lavishing or pouring out without sting. Thy vast profusion to the factious nobles Rowe.
2. Abundance; exuberant plenty; lavish supply; as, a profusion of commodities. Addison.
Shades of meaning
Fernald has no entry of its own for profusion; he lists it under excess.
Where he writes about it:
Overplus and superabundance denote in the main a satisfactory, and superfluity an undesirable, excess; lavishness and profusion, a generous, bountiful, or amiable excess; as, a profusion of fair hair; lavishness of hospitality. — from excess