Shoelace is the compound noun.
Yes, butterfly is a solid/closed compound word.Solid/Closed Compounds are formed when two or more words are put together and do not need to be separated.Ex: mailbox, sunshine, bookmark, shoelace
The noun in the sentence is school district (a compound noun).
The only noun in the sentence is babysitter, a closed compound noun.
Software
Classroom is a closed compound word.
The noun rowboat is a closed compound.
Software
Yes, rowboat is a closed compound word.
Firetruck is a closed compound word.
Both Volleyball and Softball are closed compounds
Some examples of closed compound nouns are:arrowrootbaseballcardboarddeadbeatelderberryfireplacegoalposthouseboaticebergjumpsuitkeepsakelunchboxmeatloafnotebookoutsideportholequartermasterrooftopsoapsudstenderfootunderdogviewpointwarthogyearbookzooplankton
The sentence should be: "Please keep this door closed."