Assiduity1. (n.) Constant or close application or attention, particularly to some business or enterprise; diligence.
2. (n.) Studied and persevering attention to a person; -- usually in the plural.
Thesaurus Entries
advertence, advertency, alertness, application, ardor, assiduousness, attention, attention span, attentiveness, awareness, bulldog tenacity, care, concentration, consciousness, consideration, constancy, diligence, dogged perseverance, doggedness, ear, earnestness, endurance, energeticalness, energy, engrossment, fervor, fidelity, heed, heedfulness, indefatigability, industriousness, industry, insistence, insistency, intentiveness, intentness, laboriousness, loyalty, mindfulness, note, notice, observance, observation, obstinacy, pains, painstaking, painstakingness, patience, patience of Job, permanence, perseverance, persistence, persistency, pertinaciousness, pertinacity, plodding, plugging, preoccupation, regard, regardfulness, relentlessness, remark, resolution, respect, sedulity, sedulousness, single-mindedness, singleness of purpose, slogging, stability, stamina, staying power, steadfastness, steadiness, stick-to-itiveness, strenuousness, stubbornness, tenaciousness, tenacity, thoroughgoingness, thoroughness, thought, tirelessness, unremittingness, unsparingness, unswerving attention, vehemence, zealousness