The spelling of the word "more highgrowing" is interesting because it contains a combination of two adjectives, "more" and "highgrowing". The second adjective is not a commonly used word and may be difficult to spell. However, by breaking down the word into its phonetic components, we can understand its spelling. "Highgrowing" is spelled as /haɪˈgroʊɪŋ/, with the stress on the first syllable. This means that it is pronounced "HIGH-grow-ing". When combined with "more", it becomes "MORE HIGH-grow-ing".