Union
$$A \cup B =$$
{ advertise, analyze, contextualize, distress, eustress, express, hyperstress, hypostress, identify, learn, localize }
Symmetric Difference
$$A \ominus B =$$
{ advertise, analyze, contextualize, distress, eustress, express, hyperstress, hypostress, identify, learn, localize }
Difference
$$A - B =$$
{ advertise, analyze, contextualize, express, identify, learn, localize }
Cartesian Product
$$A \times B =$$
{ (advertise, distress),
(advertise, eustress),
(advertise, hyperstress),
(advertise, hypostress),
(analyze, distress),
(analyze, eustress),
(analyze, hyperstress),
(analyze, hypostress),
(contextualize, distress),
(contextualize, eustress),
(contextualize, hyperstress),
(contextualize, hypostress),
(express, distress),
(express, eustress),
(express, hyperstress),
(express, hypostress),
(identify, distress),
(identify, eustress),
(identify, hyperstress),
(identify, hypostress),
(learn, distress),
(learn, eustress),
(learn, hyperstress),
(learn, hypostress),
(localize, distress),
(localize, eustress),
(localize, hyperstress),
(localize, hypostress) }