TclForth - Features - Video
h Always compiles
Command line is compile and execute. Thus compiler words are working.
Like all interpreter languages besides Forth.
Unique names. No confusion with vocabularies and wordlists. Eliminates ONLY ALSO ...
Also in working code, change a running program. This is a feature of Tcl. But also works in Forth, ex. Holon86 ff.
The stack is mainly used for argument transfer. But access it inside word code if you prefer.
The interpreter passes control to the units (words or commands) to execute or compile themselves.