breaststroker vs breaststroke

breaststroker and breaststroke both are nouns.

Word	Noun	Adjective	Verb	Adverb
breaststroker	Yes	No	No	No
breaststroke	Yes	No	Yes	No

breaststroker (noun)	breaststroke (noun)
someone who swims the breaststroke	a swimming stroke; the arms are extended together in front of the head and swept back on either side accompanied by a frog kick

breaststroker (verb)	breaststroke (verb)
	swim with the face down and extend the arms forward and outward while kicking with the leg