swelling
swell + -ing
https://gyazo.com/0010e0f425a7fcef4f15604501556a2f
source: By LucyHAE - Own work, CC BY-SA 3.0
noun
an abnormal enlargement of a part of the body, typically as a result of an accumulation of fluid:
ふくらむ［腫れる］もの, 増大［膨張］(すること)
e.g. painless swellings may appear in the lower abdomen.
a natural rounded protuberance:
腫れ物, こぶ
e.g. the lobes are prominent swellings on the base of the brain.
adjective
becoming greater in intensity, number, amount, or volume:
隆起した, 腫れ上がった
e.g. the swelling ranks of Irish singer-songwriters.