(n.) The state or quality of being earnest; intentness; anxiety.

abandon absorption advertence advertency alertness ardency ardor assiduity assiduousness attention attention span attentiveness awareness care commitment committedness concentration consciousness consideration decidedness decision decisiveness decorousness dedication definiteness deliberation demureness determinateness determination determinedness devotedness devotion devoutness diligence doggedness ear earnest engrossment faith faithfulness fervency fervidness fervor fidelity fire firmness formality gravity grimness heartiness heat heatedness heed heedfulness impassionedness intensity intentiveness intentness long face loyalty mindfulness note notice observance observation obstinacy passion passionateness perseverance persistence purpose purposefulness regard regardfulness relentlessness remark resoluteness resolution resolve resolvedness respect sedateness self-will seriousness sincerity single-mindedness sober-mindedness soberness sobersidedness sobersides sobriety solemnity solemnness somberness spirit staidness straight face tenacity thought thoughtfulness total commitment vehemence warmth weightiness will zeal