Union
$$A \cup B =$$
{ committee, ecology, ethical, hierarchy, idealistic, matrix, realistic, ritualistic }
Symmetric Difference
$$A \ominus B =$$
{ committee, ecology, ethical, hierarchy, idealistic, matrix, realistic, ritualistic }
Difference
$$A - B =$$
{ committee, ecology, hierarchy, matrix }
Difference
$$B - A =$$
{ ethical, idealistic, realistic, ritualistic }
Cartesian Product
$$A \times B =$$
{ (committee, ethical),
(committee, idealistic),
(committee, realistic),
(committee, ritualistic),
(ecology, ethical),
(ecology, idealistic),
(ecology, realistic),
(ecology, ritualistic),
(hierarchy, ethical),
(hierarchy, idealistic),
(hierarchy, realistic),
(hierarchy, ritualistic),
(matrix, ethical),
(matrix, idealistic),
(matrix, realistic),
(matrix, ritualistic) }