distend
dɪˈstɛnd
verb
swell or cause to swell by pressure from inside.
the abdomen distended rapidly
swell,bloat,bulge,puff out/up,blow up/out,expand,dilate,inflate,enlarge,tumefy,intumesce,swollen,bloated,tumescent,dilated,engorged,enlarged,inflated,stretched,blown up,pumped up/out,expanded,extended,ballooning,puffy,puffed up,bulbous,bulging,protuberant,prominent,sticking out,turgescent,ventricose,tumid