TIME PERIOD is a broad TERM that can refer to any length of time, from a few seconds to millions of years. The crossword solutions for TIME PERIOD include EON (3 letters), DAY (3 letters), TERM (4 letters), AGE (3 letters), ERA (3 letters), ERAS (4 letters), HOUR (4 letters), SPAN (4 letters), WEEK (4 letters), YEAR (4 letters), EPOCH (5 letters), SPELL (5 letters), WHILE (5 letters), DECADE (6 letters), CENTURY (7 letters), QUARTER (7 letters), DURATION (8 letters), and SOLARDAY (8 letters). These words all refer to different lengths of time, ranging from the smallest unit of time (seconds) to the longest (millions of years).