The mouthlike opening could easily swallow the logs and branches bunched against the mountainside above.    From Wordnik.com.  [The Hour of the Gate]

Objects of this kind, like this piece of bamboo, have a mouthlike form and vary from 30 to 60 centimeters in length.    From Wordnik.com.  [The Manóbos of Mindanáo Memoirs of the National Academy of Sciences, Volume XXIII, First Memoir] Reference

His voice was neither hostile nor welcoming, and it came not from the mouthlike indentation in the furry face, but from the waving tentacles.    From Wordnik.com.  [A Wrinkle in Time]

There were a few locals about, mostly Keklir, a bipedal race with short, powerful limbs and faces dominated by a wide, tapering snout with two mouthlike openings.    From Wordnik.com.  [Orphaned Worlds, 1st Draft, 2nd Excerpt « INTERSTELLAR TACTICS] Reference

Another of the mouthlike openings around the edge of the arena opened, and one of the furry people shambled out, weaving weakly from side to side as he came, a spear in his scaled paws.    From Wordnik.com.  [Star Born] Reference

That wooden box, with its mouthlike slit was like an insatiable monster that was constantly fed, yet was still gaping for more.    From Wordnik.com.  [I Will Repay] Reference