What's the noun for crownshaft? Here's the word you're looking for.
crown
A royal, imperial or princely headdress; a diadem.
(heraldry) A representation of such a headdress, as in heraldry; it may even be that only the image exists, no physical crown, as in the case of the kingdom of Belgium; by analogy such crowns can be awarded to moral persons that don't even have a head, as the mural crown for cities in heraldry
A wreath or band for the head, especially one given as reward of victory or a mark of honor.
(by extension) Any reward of victory or a mark of honor.
Imperial or regal power, or those who wield it.
(metonymy) The sovereign (in a monarchy), as head of state.
(by extension, especially in law) The state, the government (headed by a monarch).
Any currency (originally) issued by the crown (regal power) and often bearing a crown (headdress); (translation) various currencies known by similar names in their native languages, such as the koruna, kruna, krone
“After the crowner made his determination, he reported his findings to the king.”
“Whichsomever this mought be,'twasn't my business to be gittin' up a row and a to-do before the crowner and all them gentlemen.”
“We are glad to present our two latest projects: the first one is a floor display made of corrugated polypropylene with removable crowner, printed in four colour, ideal for companies exhibiting?”
crownshaft
(botany) A leafbase which forms on some palms above the trunk and below the crown and above the trunk.
“There on the pendent boughs her crownet weeds Clambering to hang, an envious sliver broke, When down her weedy trophies and herself Fell in the weeping brook.”