apposite

Strikingly appropriate or relevant; well suited to the circumstance or in relation to something.

c. 1833–1856, Andrew Carrick, John Addington Symonds (editors), Medical Topography of Bristol, in Transactions of the Provincial Medical and Surgical Association/Volume 2/3, Medical Topography would be the most apposite title, since it comprehends the principal objects of investigation; ….

Flora, however, received the remark as if it had been of a most apposite and agreeable nature; approvingly observing aloud that Mr. F's Aunt had a great deal of spirit.

Positioned at rest in respect to another, be it side-to-side, front-to-front, back-to-back, or even three-dimensionally: in apposition.

In other words, they are used to name, rather than to describe. They are apposite nouns and not adjectives.

Related, homologous.

If the shift in theatrical setting and the shift in dramaturgy are at all related, they are apposite developments, independent yet homologous signs of a changing political and cultural climate.

That which is apposite; something suitable.

Hugh gave the boy apples or other small apposites[…], but the child was too interested in the bishop to notice the gifts.