Goby and Go under

Goby noun - Small spiny-finned fish of coastal or brackish waters having a large head and elongated tapering body having the ventral fins modified as a sucker.

Go under and goby are semantically related. In some cases you can use "Go under" instead a verb "Goby".

Go under verb - Go under, "The raft sank and its occupants drowned".

Goby and go under are semantically related. Sometimes you can replace term "Goby" with "Go under", this verbs are similar.