Intercessions - Vine's Expository Dictionary of New Testament Words
Intercessions[ A-1,Noun,G1783, enteuxis ]
primarily denotes a lighting upon, meeting with" (akin to B); then, "a conversation;" hence, "a petition," a meaning frequent in the papyri; it is a technical term for approaching a king, and so for approaching God in "intercession;" it is rendered "prayer" in 1 Timothy 4:5; in the plural in 1 Timothy 2:1 (i.e., seeking the presence and hearing of God on behalf of others). For the synonymous words, proseuche, deesis, See PRAYER.
[ B-1,Verb,G1793, entunchano ]
primarily "to fall in with, meet with in order to converse;" then, "to make petition," especially "to make intercession, plead with a person," either for or against others;
(a) against, Acts 25:24, "made suit to (me)," RV [AV, "have dealt with (me)"], i.e., against Paul; in Romans 11:2, of Elijah in "pleading" with God, RV (AV, "maketh intercession to"), against Israel;
(b) for, in Romans 8:27, of the intercessory work of the Holy Spirit for the saints; Romans 8:34, of the similar intercessory work of Christ; so Hebrews 7:25. See DEAL WITH, PLEAD, SUIT.
[ B-2,Verb,G5241, huperentunchano ]
"to make a petition" or "intercede on behalf of another" (huper, "on behalf of," and No. 1), is used in Romans 8:26 of the work of the Holy Spirit in making "intercession" (See No. 1, Romans 8:27).