Lifeboats are a thing, so it is a noun.
part of speech
The part of speech for this particular word is a noun.
16 lifeboats 16 lifeboats plus 4 collapsibles
there was 12 lifeboats.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
No, Titanic had twenty lifeboats.
No, there were only 20 lifeboats.
Were are the lifeboats kept when not in use?
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.