Nova Iuncta Verba Latina, Pars Sescentesima Undecima

[diaphanus]

"Nova Iuncta Verba Latina, Pars Sescentesima Undecima"
"New Latin Compounds, Part Six Hundred Eleven"

Yeah:

rhomicursus -us m. "rum-running"
[rhomium "rum" + cursus "running"]
[rhomio- + cursu-] stems
[rhomii- + cursu-] o becomes Connecting Vowel i
[rhomi- + cursu-] ii becomes i
[rhomicursu-] new stem
[rhomicursus] nominative singular