decidedly, enormously, extremely, highly, hugely, immensely, mightily, most, particularly, really, tremendously, truly, very
Her performance at the piano competition was truly impressive for someone who had only been practicing for six months.
far from, hardly, not unduly
The new restaurant's menu was hardly impressive, despite all the hype on social media.
fairly, pretty, quite, rather
suitably
The hotel's grand lobby was suitably impressive for a five-star establishment.
equally, similarly
Her performance in the final match was equally impressive as her earlier games.
technically, visually
The new stadium is visually impressive with its modern design and steel architecture.