(1)Pick out two compound words from the following:
indefinite, noteworthy, remembrance, rainforest, email, planning
(2)Write any two compound words.
(3)Find out 2 hidden words of minimum 4 letters from -
    (i)’gramophone’
    (ii) ‘reverberated’

Hint: Two words that are joined together to create a combined meaning and are then used as one word is called a compound word. These words become grammatically correct after enough usage.

Complete answer:
The compound words that are added to the dictionary become grammatically accepted and do not require hyphenation. These words are used frequently in the English language.
For example, the word ‘door’ and the word ‘knob’ can be used separately, and then, were put together in order to form ‘doorknob’. This word is now acceptable for general use.

Let us look at the first question-
We have been given six words. Let’s understand the meaning of the given words-
-The word ‘indefinite’ refers to ‘lasting for an unknown or unstated length of time'. This word is not made up of two separate words. This is not the required answer. So, this is an incorrect option.
-The word ‘noteworthy’ refers to ‘worth paying attention to; interesting or significant'. This word is made up of two words, ‘note’ and ‘worthy’. This is the required answer. So, this is one of the correct options.
-The word ‘remembrance’ refers to ‘the action of remembering something'. This word is not made up of two separate words. This is not the required answer. So, this is an incorrect option.
-The word ‘rainforest’ refers to ‘an area of tall, mostly evergreen trees and a high amount of rainfall'. This word is made up of two words, ‘rain’ and ‘forest’. This is the required answer. So, this is one of the correct options.
-The word ‘email’ refers to ‘messages distributed by electronic means from one computer user to one or more recipients via a network'. This word is not made up of two separate words. This is not the required answer. So, this is an incorrect option.
-The word ‘planning’ refers to ‘the process of making plans for something'. This word is not made up of two separate words. This is not the required answer. So, this is an incorrect option.

So, the compound words are ‘noteworthy’ and ‘rainforest’.

Let us look at the second question-
Two grammatically compound words are as follows-
One word is ‘candlestick’ which refers to ‘a support or holder for one or more candles, typically one that is tall and thin’.
Another word is ‘sailboat’ which refers to ‘a boat propelled by sails; a sailing boat'.

Let us look at the third question-
The first word is ‘gramophone’. A hidden word can be ‘phone’ and ‘pram’.
The second word is ‘reverberated’. A hidden word can be ‘beat’ and ‘rated’.

Note:
Break the given questions down. Study each part carefully. Then, go through the given questions and answer each question with the answer which best fits the given requirements of the question.