Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun distension

2 senses of distension

Sense 1
distention, distension -- (the act of expanding by pressure from within)
       => expansion, enlargement -- (the act of increasing (something) in size or volume or quantity or scope)

Sense 2
dilatation, distension, distention -- (the state of being stretched beyond normal dimensions)
       => physical condition, physiological state, physiological condition -- (the condition or state of the body or bodily functions)