The article's main result concerns the Ca\-m\-po\-na\-to-Mor\-rey spaces \(\mathcal L^{(q,\lambda)}_k\), defined here, for \(1\le q0\), and \(k\in\mathbb N\cup\{0\}\) as the space of all \(L^q\)-functions \(f\) on \(\mathbb R\) such that the value \[ \sup_{x\in\mathbb R,\,r>0}\,\frac1{r^\lambda}\inf_{P\in\mathcal P_k}\int_{x-r}^{x+r}\!|f-P|^q \] is finite; \(\mathcal P_k\) is the class of all polynomials of degree \(\le k\). The author, as a consequence of a series of lemmas, arrives to the main result, Theorem 8, which says that for \(01\), every member of \(\mathcal L^{(q,\lambda)}_k\) is a.e.\ equal to some element of the Lipschitz (Hölder) \(\Lambda_\alpha\) space. Moreover, the corresponding injection \(\mathcal L^{(q,\lambda)}_k\to\Lambda_\alpha\) is a continuous mapping. This result is offered as a part of a collection of various theorems that subordinate to one leitmotiv: all describe smoothness/differentiability without derivation terms. The topics covered include approximation theory, Fourier transform, Poisson integral, and Landau's inequalities.