so·lus 
(sōləs)
(sōləs)adv. & adj.
By oneself; alone. Used as a stage direction to a male character.
[Latin sōlus, alone; see SOLO.]
- street-smart
- street smarts
- street theater
- streetwalker
- streetwalking
- streetwise
- strength
- strengthen
- strengthener
- strenuous
- strenuously
- strenuousness
- strep
- strepsirhine
- strepsirrhine
- strep throat
- strepto-
- streptobacillus
- streptocarpus
- streptococcal
- streptococcic
- streptococcus
- streptodornase
- streptokinase
- streptolysin