Relative (relatively to something) is the opposite of absolute (absolute scale).
Subjective (relatively to the subject) is the opposite of objective (no bias).
Speed is relative and objective.
Can something be both subjective and absolute?
Relative (relatively to something) is the opposite of absolute (absolute scale).
Subjective (relatively to the subject) is the opposite of objective (no bias).
Speed is relative and objective.
Can something be both subjective and absolute?
Yes: society. the rules of society (laws, behavioral codes, etc.) are objective in the sense that they do not depend on the subjective states of individuals. an individual can decide that murder is just fine, but the law - external to the individual - says otherwise. otoh, social rules are also subjective. it is only because individuals bind themselves to the law that it has force.
p.s. you've conflated "objective" and "absolute". the rule against murder is objective but not absolute (it is not a law of nature).
for example you could argue that our sensory perceptions (i feel pain) are both subjective and "incorrigible" (Rorty) and thus absolute.
Everything subjective is also an objective truth. Subjective truths are a category of objective truths, not an independent set of truths.
Take any subjective truth T. That will be true in contexts A, B, and C but not true in contexts X, Y, and Z. It is, therefore, an objective truth that T is true for A, B, and C but false for X, Y, and Z.
Fundamentally, the only input humans have from the universe is the evidence of our senses (construed broadly). This is subjective. However, from this input, we are able to derive the objective fact that the universe must be such that we have the sensory input we do have. This means that any state of the universe that would not result in us having the sensory experiences we actually have cannot be the objective truth.
Objective truth is unknowable from a human perspective, all we can do is classify almost certain probabilities as objective, which is the pragmatic manner of dealing with these things in order to avoid constant doubt.
From our perspective many things appear absolute, yet are ultimately subjective, and that is the best definition we can come up with for anything, really. All human thought is subjective in that it all stems from the human bias of existence, meaning our definitions of objective/absolute are ultimately irrelevant when discussing empiricism.
I would say that most things we take for granted are treated as absolutes, whilst ultimately being subjective, such as 'the sun will rise tomorrow', 'I will wake up after I go to sleep', 'If I eat when I'm hungry, I won't be hungry anymore'.
Realistically these are just subjective opinions, yet they're often considered absolute. Really everything has a bias, even if it's just confirmation bias, and so I think the whole question is dependent upon humans being able to identify or quantify objectivity in a meaningful manner - which cannot be, as we are not omniscient.