Punctual
The adjective form for punctuality is punctual.
The noun punctuality is from the adjective punctual(which also creates the more rarely seen noun punctualness, which is poor English).
punctuality
Five.
The noun 'punctuality' is an abstract noun, a word for the characteristic of reliably arriving at or completing something at or by the appointed time; a word for a concept.
The adjective form for punctuality is punctual.
The word "suitable" is an adjective. It describes a noun by indicating that something is appropriate or fitting for a particular purpose or situation.
The noun punctuality is from the adjective punctual(which also creates the more rarely seen noun punctualness, which is poor English).
punctuality
The noun forms of the adjective 'suitable' are suitableness and suitability.
Tagalog for punctuality: ganap; maagap sa oras
Your question is not entirely clear, since it can be interpreted in several different ways. If you want to know the meaning of the phrase "suitable adjective" it means a descriptive word that conveys the meaning that you have in mind. If you want to know if the word suitable is an adjective, yet it is. If you are looking for a suitable adjective for some particular purpose, we obviously would have to know what that purpose is, before we could propose a suitable adjective for you to use.
The word "arable" is an adjective. It is used to describe land that is suitable for plowing and farming.
The word 'cultural' is the adjective form of the noun culture.
The word 'affectionate' is the adjective form of the noun affection.
Five.
The noun 'punctuality' is an abstract noun, a word for the characteristic of reliably arriving at or completing something at or by the appointed time; a word for a concept.