sol / sole / soul are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
sol: (noun) a colloid that has a continuous liquid phase in which a solid is suspended in a liquid. (noun) (Roman mythology) ancient Roman god; personification of the sun; counterpart of Greek Helios. (noun) the syllable naming the fifth (dominant) note of any musical scale in solmization.
sole: (noun) the underside of footwear or a golf club. (noun) lean flesh of any of several flatfish. (noun) the underside of the foot. (noun) right-eyed flatfish; many are valued as food; most common in warm seas especially European. (verb) put a new sole on.
soul: (noun) the immaterial part of a person; the actuating cause of an individual life. (noun) deep feeling or emotion. (noun) the human embodiment of something. (noun) a secular form of gospel that was a major Black musical genre in the 1960s and 1970s.
sol: s·AA·l
sole: s·OW·l
soul: s·OW·l
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)