regular vs weak

regular is a noun but weak is not a noun.

Word	Noun	Adjective	Verb	Adverb
regular	Yes	Yes	No	No
weak	No	Yes	No	No

regular (noun)	weak (noun)
a garment size for persons of average height and weight
a regular patron
a dependable follower (especially in party politics)
a soldier in the regular army

regular (adjective)	weak (adjective)
in accordance with fixed order or procedure or principle	wanting in physical strength
(of solids) having clear dimensions that can be measured; volume can be determined with a suitable geometric formula	overly diluted; thin and insipid
(used of the military) belonging to or engaged in by legitimate army forces	tending downward in price
not constipated	likely to fail under stress or pressure
relating to a person who does something regularly	lacking bodily or muscular strength or vitality
officially full-time	wanting in moral strength, courage, or will; having the attributes of man as opposed to e.g. divine beings
not deviating from what is normal	deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc
regularly scheduled for fixed times	not having authority, political strength, or governing power
conforming to a standard or pattern	(used of verbs) having standard (or regular) inflection
occurring at fixed intervals	deficient in intelligence or mental power
symmetrically arranged	deficient or lacking in some skill
often used as intensifiers	(used of vowels or syllables) pronounced with little or no stress
in accord with regular practice or procedure