Now I've got to do bit of thinking - thinks - Ah, yes - It's ABSTRACT, with ANIMAL connections.
Nothing whatsoever to do with steam engines.
As this seems to be a little slow I'll say that the Words on the Card are the indefinite article plus one other, and that the answer is exceedingly commonplace.
Is it time for the gentlest of hints?
So, next up is ABSTRACT with animal and vegetable connections