skimmer vs boater

skimmer and boater both are nouns.

Word	Noun	Adjective	Verb	Adverb
skimmer	Yes	No	No	No
boater	Yes	No	No	No

As nouns, skimmer and boater are synonyms defined as:

Other synonyms of skimmer include leghorn, Panama, Panama hat, sailor, straw hat.

skimmer (noun)	boater (noun)
gull-like seabird that flies along the surface of the water with an elongated lower mandible immersed to skim out food	a stiff hat made of straw with a flat crown
a stiff hat made of straw with a flat crown	someone who drives or rides in a boat
a cooking utensil used to skim fat from the surface of liquids
a rapid superficial reader