groin

Words with a similar base: groin

'groin'

[groin.n.01] as in: the crease at the junction of the inner part of the thigh with the trunk together with the adjacent region and often including the external genitals

'groin'

[groin.n.02] as in: a curved edge formed by two intersecting vaults

'groin'

[breakwater.n.01] as in: a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away

'groin'

[groin.v.01] as in: build with groins

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Examples:
The ceiling was groined