full-length, half-length
oil, pastel, etc.
photographic
equestrian, family, group, royal

do, draw, paint
sit for
commission
write
display, exhibit, show

hang
Ancient family portraits hung on the walls of the staircase.

gallery
artist, painter, photographer
a fashionable portrait painter

bust

portrait by, portrait of
a portrait of the writer by Picasso

intimate
vivid
The novel provides a vivid portrait of the Holberg family.

pen (esp. BrE)
The letters contained many deft pen portraits of his colleagues.

create, draw
The book drew a stark portrait of Quebec's urban poor.

offer, present