Theory:

Ways to form a compound noun.
  
Compound nouns are nouns that are made with two or more words.
 
   
Example
 Application of compound nouns
Noun
+
Noun
Bus stop
Is this the bus stop for the number 1 bus?
   
Fireflies
In these areas, you can see fireflies at night.
   
Grandmother
The grandmother is looking tired today.
Noun
+
Verb
Sunrise
I like to see the sunrise.
   
Raindrop
The raindrop looks beautiful on lotus leaves.
   HandmadeThe handmade bag is awesome.
 Adjective
+
 Noun
BlackboardDon't break the blackboard.
   Full moonIts generally, Holi festival on full moon day.
   HighwayThe highway is full of trucks.
 Adverb
+
 Noun
OverdoseRakesh had an overdose of sleeping pills.
   OutsideLalita went outside.
   OutdoorRamu loves playing outdoor games.
Verb
+
Noun
Washing machineThis washing machine is not working properly
   Swimming poolThat swimming pool is too big.
Adverb
+
Noun
UpstairsThe cat went upstairs to sleep.
   DownstairsHe went downstairs to open the door
Verb
+
Adverb
TakeoverThey were able to launch a takeover of our company.
Adverb
+
Verb
OutputThe code is not giving proper output.
   IntakeHe has been advised to increase his fibre intake.