so·ro·ral 
(sə-rôrəl)
(sə-rôrəl)adj.
Of, relating to, or resembling a sister; sisterly.
[From Latin soror, sister; see swesor- in the Appendix of Indo-European roots.]
- subliterary
- subliterate
- subliterature
- sublittoral
- sublunar
- sublunary
- subluxation
- submachine gun
- submandibular
- submarginal
- submarine
- submarine chaser
- submariner
- submarine sandwich
- submarket
- submaxilla
- submaxillary
- submediant
- submerge
- submerged
- submergence
- submergibility
- submergible
- submerse
- submersed