Persistence is a good way to put it too. Seems like the interpretation of the terms are similar. From Google "define persistent" or "define tenacious"... Sea

Persistence is a good way to put it too. Seems like the interpretation of the terms are similar. From Google "define persistent" or "define tenacious"... Search Results te·na·cious/təˈnāSHəs/Adjective 1. Not readily letting go of, giving up, or separated from an object that one holds, a position, or a principle: "a tenacious grip". 2. Not easily dispelled or discouraged; persisting in existence or in a course of action: "a tenacious legend". per·sist·ent/pərˈsistənt/Adjective 1. Continuing firmly or obstinately in a course of action in spite of difficulty or opposition. 2. Characterized by a specified habitual behavior pattern, esp. a dishonest or undesirable one.