About: piston engine

Premodifier: piston
Head noun: engine

Same concepts
http://dbpedia.org/resource/Reciprocating_engine

Broader concepts

label	provenance	confidence
heat engine	isap:395701592	0.654165
type of internal combustion	isap:495526273	0.643147
power source	isap:386722649	0.528916
machine	isap:440388050	0.424441
engine	isap:395701290	0.411191
case	isap:497075348	0.269023

Narrower concepts

label	provenance	confidence
internal combustion	isap:255576948	0.703267
diesel engine	isap:395701574	0.631664