cope·stone 
(kōpstōn)
(kōpstōn)n.
A capstone.
[COPE2 + STONE.]
- housepainter
- house painter
- houseparent
- house party
- houseperson
- house physician
- houseplant
- house-proud
- house-raising
- houseroom
- house seat
- housesit
- housesitter
- house snake
- house sparrow
- house staff
- housetop
- house trailer
- housetrain
- house-train
- housetrained
- housewares
- housewarming
- housewife
- housewifeliness