coastline, shoreline / a railroad that follows a coastline

line / level / beam

seagull

common gull (Larus canus) / (by extension) a seagull (any seabird of the family Laridae)

a female given name / a surname

coast; shore (the border between land and sea)

to fly / to jump / to go quickly / to splash, splatter

to see, to watch, to observe, to look at something / to look over, to examine, to judge / to take care of, to look after, to keep an eye on somebody

disgraceful, shameful, indecent / shabby, unsightly

in a flash, in an instant