Mountaintop is a compound word.
mountaintop
A compound word for "mountain" is "mountaintop." A compound word is formed by combining two separate words to create a new word with a distinct meaning. In this case, "mountain" and "top" are combined to refer to the peak or summit of a mountain.
peak
All these words are compound words and start with m: machinegun, madman, mailbox, mailman, mailroom, mainland, makeover, makeup, masterpiece, matchbook, meathead, millstone, moonlight, motherland, motorcycle, mountaintop and mouthpiece.
the top of the mountain
Cima is an Italian equivalent of the English word "mountaintop." The feminine singular noun also may be found replaced by the synonymous sommità and vetta for "mountaintop," "peak" or "summit." The respective pronunciations will be "TCHEE-ma," "SOM-mee-TA" and "VET-ta" in Pisan Italian.
No, building is not a compound word.
The contraction (not a compound word) is doesn't.
Upwards is a compound word.
There is no compound word.A compound word is a word like bus-stop.Husban is spelt like this husband
Upstairs is a compound word, so it is one word.
Mango is not a compound word.