phoresy
noun
phor·e·sy
ˈfȯrəsē
plural -es
: the nonparasitic association of one kind of animal (as a larval insect) with another in order to obtain transportation
Word History
Etymology
New Latin phoresia, from Greek phorēsis being carried (from phorein to carry along, wear, frequentative of pherein to carry) + Latin -ia -y