nonappearance (noun) absence: state of not being present
Sinonime: add up, cast up, cipher, count, count heads, count noses, cut ice, dope out, enumerate, figure,
figure out, gauge, keep tabs, measure, rate, reckon, run down, size up, sum, take account of, take one's measure, tally, tot,
total, tote, tote up
Antonime: conjecture, guess, guesstimate,
surmise