trade·craft 
(trādkrăft′)
(trādkrăft′)n.
The methods used in clandestine operations such as espionage.
- strepsirhine
- strepsirrhine
- strep throat
- strepto-
- streptobacillus
- streptocarpus
- streptococcal
- streptococcic
- streptococcus
- streptodornase
- streptokinase
- streptolysin
- streptomyces
- streptomycin
- streptonigrin
- streptothricin
- streptozocin
- streptozotocin
- Stresemann
- stress
- stressed-out
- stress fracture
- stressful
- stressfully
- stressfulness