Are the phrases “very interesting”and”consuming” synonymous

No, it is not. Synonnymous for consuming can be gripping

haunting, addictive etc.

here same word

taking all of a person's time and attention : being the only thing a person thinks about Her all-consuming passion was music

obsessive

compulsive

consuming

postive, comparative, superlative - good, better, best

recall how we defined nouns as words capable of having plurals and possessive endings. adjectives (and their first cousin, the adverb) also have a feature that distinguishes them. they come in three states. first, the raw adjective—in its positive state—merely describes the noun modified; it doesn’t care about how this particular person or thing stacks up against other members of the same noun class