[1] : WordNet (r) 2.0

riser main
     n : a vertical pipe in a building syn: riser, riser pipe, riser
         pipeline
see also:
riser riser pipe riser pipeline 

Main >> M Words
Main, definition of term: Main
main_pag1.html

Main Road >> M Words
Main Road, definition of term: Main Road
main+road_pag1.html

Main Street >> M Words
Main Street, definition of term: Main Street
main+street_pag1.html

Main Memory >> M Words
Main Memory, definition of term: Main Memory
main+memory_pag1.html

Main Line >> M Words
Main Line, definition of term: Main Line
main+line_pag1.html

Main Brace >> M Words
Main Brace, definition of term: Main Brace
main+brace_pag1.html

Main Distributi >> M Words
Main Distributi, definition of term: Main Distributi
main+distributi_pag1.html