Open English Wordnet
Nouns
Verbs
(v)suffocate, stifle, asphyxiate, chokeimpair the respiration of or obstruct the air passage of“The foul air was slowly suffocating the children”
(v)suffocate, stifle, asphyxiatebe asphyxiated; die from lack of oxygen“The child suffocated under the pillow”