Nouns

(n)six, 6, VI, sixer, sise, Captain Hicks, half a dozen, sextet, sestet, sextuplet, hexadthe cardinal number that is the sum of five and one
(n)six-spot, sixa playing card or domino or die whose upward face shows six pips

Adjectives

(s)six, 6, vi, half dozen, half-dozenbeing one more than five