To create multiple English words from the phrase 'Happy New Year and Marry Christmas', one can use different techniques such as anagrams, word unscrambling, and word generators. These techniques are commonly used by English language experts and can help in expanding one's vocabulary.

Firstly, using an anagram solver, one can rearrange the letters of the phrase to form new words. Some possible words that can be created are 'cherry', 'damp', 'charm', 'marshy', 'parch', 'ready', etc. One can also try changing the letter order to create words like 'parchment' and 'menarche'.

Secondly, a word unscrambling tool can be used to find meaningful words from the given phrase. Some suggestions could be 'hypernym', 'sapience', 'reprints', 'mandarin', 'chasten', etc.

Lastly, using a word generator, one can come up with a variety of words from the letters in the phrase. Commonly used word generator techniques include using prefixes and suffixes to modify the existing letters. Some words that can be formed are 'dreamy', 'symmetry', 'apartment', 'happier', 'reason', etc.