The word 'significance' is a noun. For example:
'The significance of this message is quite clear: its meaning is obvious.'
'What do you believe is the significance of this religious symbol? Do you know what it means?'
'The significance of the word 'essence' in a sentence depends on the context: you might speak of the essence of a subject, the central meaning, or of a floral essence, the essential oil derived from a flower.'
To 'signify' is a verb:
What does this message signify?'
The root is the word 'sign': an indication of something not necessarily tangible, not visible, or to communicate by sign, that is, non-verbally.
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
The part of speech for "explicit" is an adjective.
The part of speech for "unfamiliar" is an adjective.
The part of speech for "indefinite" is an adjective.
Speech that has an obvious and immediate danger of creating unrest or violence
part of speech
The part of speech for this particular word is a noun.
adverb
what part of speech is beneath
The part of speech for "answer" is a noun.
The part of speech for "explicit" is an adjective.
The part of speech for "unfamiliar" is an adjective.
The part of speech for "indefinite" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "breezy" is an adjective.
The part of speech for "buried" is a verb.