if
Supposing that, assuming that, in the circumstances that; used to introduce a condition that may be (or prove to be) either true or false.
A keyword that invokes conditional processing: in the event that a given condition is true, execute the given statement(s) (otherwise execute other statements).
Supposing that; used with past or past perfect subjunctive to indicate a counterfactual or hypothetical condition.
Even if; even in the circumstances that.
Considering the fact that; given that; introducing a condition that is known to be true.
When; whenever; every time that.
Although; used to introduce a concession; may..but.
Whether; used to introduce a noun clause, an indirect question, that functions as the direct object of certain verbs.
Introducing a relevance conditional; in case.
While; used to introduce a contrast (frequently used by some historians but rare elsewhere)
Sound Patterns & Rhymes
Alliteration
Words starting with the same consonant sound — used in poetry and prose to create rhythm, emphasis, and memorable phrasing (e.g. “Peter Piper picked”)
Assonance
Words sharing similar vowel sounds regardless of starting letter — creates internal melody in writing