You will not unfrequently see adjectives different in form, added to a
noun of very similar meaning; as, sad melancholy, an ominous sign, this
mundane earth, pensive thoughts.

When words can be obtained, which not only name the object, but also
describe its properties, it should be preferred to a noun with an
adjective; as _pirate_, for _sea robber_; _savan_, for a _learned_ or
_wise man_.[4]

In relation to that class of adjectives derived from verbs, we will be
brief. They include what have been termed participles, not a distinct
"part of speech," but by some included in the verbs. We use them as
adjectives to describe things as standing in some relation to other
things on the account of the action expressed by the verb from which
they are derived. "The man is respected." _Respected_, in this case,
describes the man in such a relation to those who have become acquainted
with his good qualities, that he now receives their respect. He is
respect_able_, (_able_ to command, or worthy of respect,) and of course,
respected for his respectability. To avoid repetition, we select
different words to assist in the expression of a complex idea. But I
indulge in phrases like the above, to show the nice shades of meaning in
the common use of words, endeavoring to analyze, as far as possible, our
words and thoughts, and show their mutual connexion and dependencies.

What has been termed the "present participle" is also an adjective,
describing things in their present condition in reference to actions.
"The man is writing." Here, _writing_ describes the man in his present
employment. But the consideration of this matter more properly belongs
to the construction of sentences.