(n.) Theory or practice of an eclectic.

accretion addition alloy alloyage amalgam amalgamation bit blend blending coalescence combination combo comminglement commingling commixture composite composition compound concoction confection dash doctor eclecticism ensemble fortification fusion immixture integration interfusion interlarding interlardment interminglement intermingling intermixture magma merger mingling mix mix-up mixing mixture paste pluralism shade smack spice syncretism taint tinge