birth flower or birthflower?
It is a compound word. Combination of birth and day.
Rose
lazy daisy
Crazy daisy
A compound word is two or more words put together into one word. Sometimes they are separated by hyphens. Ex: Normal Compound- toothpick. Hyphenated Compound: Up-to-date; brother-in-law. Flower Vase is two words. You wouldn't write flowervase. You would write flower vase.
power flower
Yes, unless you are talking about someone's birthday and it is one word.
falling flowers Flower Shower, or Shower Flower
The conventional form is "birth date" as opposed to birthday (one word).*Oddly, although the one-word form birthdate is not widely accepted (Wiktionary being an exception), some spell-checkers do accept the plural birthdates.
It is two words. Writing it as one is acceptable in the UK and is referred to as a "Britishism." But in American grammar, it is always two separate words.
It's kind of like a corn stalk and produce one flower sometimes two.
"Another" is one word. It is used to refer to an additional or different person or thing.