piston ring vs seal

seal vs piston ring

piston ring and seal both are nouns.

piston ring is not a verb while seal is a verb.

Word	Noun	Adjective	Verb	Adverb
piston ring	Yes	No	No	No
seal	Yes	No	Yes	No

As nouns, seal is a hypernym of piston ring; that is, seal is a word with a broader meaning than piston ring:

piston ring: seal consisting of a split metal ring that seals the gap between a piston and the cylinder wall
seal: fastener that provides a tight and perfect closure

piston ring (noun)	seal (noun)
seal consisting of a split metal ring that seals the gap between a piston and the cylinder wall	any of numerous marine mammals that come on shore to breed; chiefly of cold regions
	a device incised to make an impression; used to secure a closing or to authenticate documents
	fastener consisting of a resinous composition that is plastic when warm; used for sealing documents and parcels and letters
	fastener that provides a tight and perfect closure
	a finishing coat applied to exclude moisture
	an indication of approved or superior status
	a stamp affixed to a document (as to attest to its authenticity or to seal it)
	the pelt or fur (especially the underfur) of a seal

piston ring (verb)	seal (verb)
	decide irrevocably
	hunt seals
	close with or as if with a seal
	affix a seal to
	make tight; secure against leakage
	cover with varnish

Difference between piston ring and seal

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