sloop vs knockabout

sloop and knockabout both are nouns.

Word	Noun	Adjective	Verb	Adverb
sloop	Yes	No	No	No
knockabout	Yes	Yes	No	No

As nouns, knockabout is a hyponym of sloop; that is, knockabout is a word with a more specific, narrower meaning than sloop:

sloop: a sailing vessel with a single mast set about one third of the boat's length aft of the bow
knockabout: a sloop with a simplified rig and no bowsprit

Other hyponyms of sloop include raceabout.

sloop (noun)	knockabout (noun)
a sailing vessel with a single mast set about one third of the boat's length aft of the bow	a sloop with a simplified rig and no bowsprit

sloop (adjective)	knockabout (adjective)
	suitable for rough use
	full of rough and exuberant animal spirits