where·up·on 
(wârə-pŏn′, -pôn′, hwâr-)
(wârə-pŏn′, -pôn′, hwâr-)conj.
1. On which.
2. In close consequence of which: The instructor entered the room, whereupon we got to our feet.
- dissentingly
- dissenting opinion
- dissepiment
- dissepimental
- dissert
- dissertate
- dissertation
- dissertator
- disserve
- disservice
- dissever
- disseverance
- disseverment
- dissidence
- dissident
- dissilient
- dissimilar
- dissimilarity
- dissimilarly
- dissimilate
- dissimilation
- dissimilitude
- dissimulate
- dissimulation
- dissimulative