Eighteen is a noun, specifically a cardinal number.
"Eighteenth" is an ordinal number, specifically the ordinal form of the cardinal number "eighteen." In grammar, it can function as an adjective or a noun.
The part of speech for "answer" is a noun.
The part of speech for this particular word is a noun.
The part of speech for "unfamiliar" is an adjective.
The part of speech for "explicit" is an adjective.
"Eighteenth" is an ordinal number, specifically the ordinal form of the cardinal number "eighteen." In grammar, it can function as an adjective or a noun.
The part of speech for "answer" is a noun.
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
what part of speech is work
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "unfamiliar" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech of "came" is a verb.
The word speech is a noun.