What's the largest word you can construct from the combination specified?The longest word you could derive from words with 'rna' in them is 'pseudointernationalistic', and it has 24 letters.
Is there a distinct word from this page of word with 'rna' in them which could be thought of as unique in any regard?There are many peculiar words in this list, although our favorite is 'maternal'. According to the Oxford dictionary, 'maternal' means "Of or pertaining to a mother; becoming to a mother; motherly; as, maternal love; maternal tenderness. Syn. -- See Motherly.".
What is the highest scoring word you can play in Scrabble ?With an extensive 902 entries, your best bet is to consider 'fornaxid' which scores 19 points overall.
What's the most popular word with 'rna' in them in the dictionary?The most well-known word for the combination you requested is 'eternal'.
What is the total number of words you are able to put together using words with 'rna' in them?From this page of words that include 'rna', there are 902 unique entries which are available.