Union
$$A \cup B =$$
{ be, do, efficient (creator), exist, feel, final (function), formal (design), love, material, say, see, think }
Symmetric Difference
$$A \ominus B =$$
{ be, do, efficient (creator), exist, feel, final (function), formal (design), love, material, say, see, think }
Cartesian Product
$$A \times B =$$
{ (efficient (creator), be),
(efficient (creator), do),
(efficient (creator), exist),
(efficient (creator), feel),
(efficient (creator), love),
(efficient (creator), say),
(efficient (creator), see),
(efficient (creator), think),
(final (function), be),
(final (function), do),
(final (function), exist),
(final (function), feel),
(final (function), love),
(final (function), say),
(final (function), see),
(final (function), think),
(formal (design), be),
(formal (design), do),
(formal (design), exist),
(formal (design), feel),
(formal (design), love),
(formal (design), say),
(formal (design), see),
(formal (design), think),
(material, be),
(material, do),
(material, exist),
(material, feel),
(material, love),
(material, say),
(material, see),
(material, think) }