substantial
Considerable in importance, size, or worth.
Examples
In a meeting
“We've seen a substantial increase in conversions since the redesign.”
Over coffee
“She left a substantial tip because the service was outstanding.”
Why this word
large
Substantial emphasizes importance and significance of size or amount, while large only indicates magnitude
considerable
Substantial suggests solidness and worthiness of attention, while considerable is slightly less emphatic
big
Substantial is formal and implies meaningfulness of quantity, while big is informal and vague
Usage tip
More formal than 'big' or 'a lot'. Implies something is noteworthy and worth paying attention to.
Etymology
Latin substantialis — substantia (substance, essence), from sub (under) + stare (to stand)
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Related words
perpetual
Never ending or changing; occurring continuously.
ample
More than enough; plentiful and sufficient.
negligible
So small or unimportant as to not be worth considering.
excessive
More than what is necessary, normal, or desirable; too much.
versatile
Able to adapt or be adapted to many different functions or activities.
inadvertent
Not resulting from or achieved through deliberate planning; unintentional.