pen

nouns

a writing implement with a point from which ink flows
pen
is a type of (narrower)
an implement that is used to write
an enclosure for confining livestock
pen
is a type of (narrower)
a structure consisting of an area that has been enclosed for some purpose
a portable enclosure in which babies may be left to play
a correctional institution for those convicted of major crimes
female swan
pen
is a type of (narrower)
stately heavy-bodied aquatic bird with very long neck and usually white plumage as adult

verbs

produce a literary work
"She composed a poem"; "He wrote four novels"
is derived from