Frequency is a noun.
an inventor is a designer but a designer is not an inventor
inventor of fiberglass
The word inventions is a noun. It is the plural form of invention.
The possessive form of the noun inventor is inventor's.Example: The inventor's patent was finally granted.
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.
The part of speech for "rapid" is an adjective.