packs / pax 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. 👇
packs: (noun) a complete collection of similar things. (noun) a convenient package or parcel (as of cigarettes or film). (noun) a group of hunting animals. (noun) a cream that cleanses and tones the skin. (noun) a sheet or blanket (either dry or wet) to wrap around the body for its therapeutic effect. (noun) a bundle (especially one carried on the back). (verb) arrange in a container. (verb) fill to capacity. (verb) compress into a wad. (verb) carry, as on one's back. (verb) set up a committee or legislative body with one's own supporters so as to influence the outcome. (verb) seal with packing. (verb) load with a pack. (verb) treat the body or any part of it by wrapping it, as with blankets or sheets, and applying compresses to it, or stuffing it to provide cover, containment, or therapy, or to absorb blood.
pax: (noun) (Roman Catholic Church) a greeting signifying Christian love for those assisting at the Eucharist.
packs: p·AE·k·s
pax: p·AE·k·s
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)