close vs seal

close and seal both are nouns.

Word	Noun	Adjective	Verb	Adverb
close	Yes	Yes	Yes	Yes
seal	Yes	No	Yes	No

As verbs, seal is a hyponym of close; that is, seal is a word with a more specific, narrower meaning than close:

Other hyponyms of close include snap, slat, bang, slam, shutter, draw, roll up, bung, seal off.

As verbs, seal is a hyponym of close; that is, seal is a word with a more specific, narrower meaning than close:

Other hyponyms of close include plug, secure, stop up, coapt, conglutinate.

close (noun)	seal (noun)
the concluding part of any performance	any of numerous marine mammals that come on shore to breed; chiefly of cold regions
the last section of a communication	a device incised to make an impression; used to secure a closing or to authenticate documents
the temporal end; the concluding time	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

close (adjective)	seal (adjective)
at or within a short distance in space or time or having elements near each other
close in relevance or relationship
not far distant in time or space or degree or circumstances
marked by fidelity to an original
rigorously attentive; strict and thorough
crowded
(of a contest or contestants) evenly matched
of textiles
confined to specific persons
strictly confined or guarded
used of hair or haircuts
giving or spending with reluctance
fitting closely but comfortably
inclined to secrecy or reticence about divulging information
lacking fresh air

close (verb)	seal (verb)
finish a game in baseball by protecting a lead	decide irrevocably
complete a business deal, negotiation, or an agreement	hunt seals
move so that an opening or passage is obstructed; make shut	close with or as if with a seal
become closed	affix a seal to
bar access to	make tight; secure against leakage
fill or stop up	cover with varnish
bring together all the elements or parts of
unite or bring into contact or bring together the edges of
change one's body stance so that the forward shoulder and foot are closer to the intended point of impact
come together, as if in an embrace
draw near
cause a window or an application to disappear on a computer desktop
cease to operate or cause to cease operating
finish or terminate (meetings, speeches, etc.)
engage at close quarters
come to a close
be priced or listed when trading stops

close (adverb)	seal (adverb)
near in time or place or relationship
in an attentive manner