1. Totally unlikely
   - impossible, inconceivable, out of the question

See also: unimaginably, unthinkable

• Solenopsis
• Solenostemon
• Solenostemon blumei
• Solenostemon scutellarioides
• Solent
• soleplate
• soleus
• soleus muscle
• solfa
• solfa syllable
• solfatara
• solfeggio
• solferino
• solfège
• solicit
• solicitation
• solicitor
• solicitor general
• solicitorship
• solicitous
• solicitously
• solicitousness
• solicitude
• solid
• solid angle