Introducing the mindwords gem

require 'mindwords'

s = "
milk #fridge
cheese #fridge #kitchen
cooker #kitchen
fridge #kitchen
paint #garage
laptop #computers #acer
kitchen #rooms
rooms #house
raspberrypi #computers
car service #car
car insurance #car
car mot #car
bitcoin #cryptocurrency #finances
cryptocurrency #finances
binance #accounts #cryptocurrency #finances #exchange
accounts #cryptocurrency
"

mw = MindWords.new(s)
puts mw.to_outline