I guess there's no doubt though that momentary switch and latching switch are opposites and behaviours. If I go to google images then search for 'toggle switch' seems to be a form factor as Shalvenay said, and
looking up "toggle switch", I see this dictionary, https://www.merriam-webster.com/dictionary/toggle%20switch which says "an electric switch operated by pushing a projecting lever through a small arc" Would you agree though that "lever switch" is a form factor, while "momentary" and "latched", are behaviours?