cap vs pillar

cap and pillar both are nouns.

Word	Noun	Adjective	Verb	Adverb
cap	Yes	No	Yes	No
pillar	Yes	No	No	No

cap (noun)	pillar (noun)
a tight-fitting headdress	(architecture) a tall vertical cylindrical structure standing upright and used to support a structure
the upper part of a column that supports the entablature	a vertical cylindrical structure standing alone and not supporting anything (such as a monument)
a top (as for a bottle)	a fundamental principle or practice
something serving as a cover or protection	a prominent supporter
(dentistry) dental appliance consisting of an artificial crown for a broken or decayed tooth	anything that approximates the shape of a column or tower
a mechanical or electrical explosive device or a small amount of explosive; can be used to initiate the reaction of a disrupting explosive
an upper limit on what is allowed
a protective covering that is part of a plant
a fruiting structure resembling an umbrella or a cone that forms the top of a stalked fleshy fungus such as a mushroom

cap (verb)	pillar (verb)
restrict the number or amount of
lie at the top of