Ad hoc and Just now

Ad hoc adjective - Made or done without previous thought or preparation.

Just now and ad hoc are semantically related In some cases you can use "Just now" instead an adjective phrase "Ad hoc".

Just now adverb - Only a moment ago.

Ad hoc and just now are semantically related in present topic. Sometimes you can use "Ad hoc" instead an adjective phrase "Just now", if it concerns topics such as existing.