seal vs sealer

seal and sealer both are nouns.

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

seal (noun)	sealer (noun)
any of numerous marine mammals that come on shore to breed; chiefly of cold regions	an official who affixes a seal to a document
a device incised to make an impression; used to secure a closing or to authenticate documents	a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface)
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

seal (verb)	sealer (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