A — 1: καυχάομαι
(Strong's #2744 — Verb — kauchaomai — kow-khah'-om-ahee )

and its related words katakauchaomai, "to glory or boast" and the nouns kauchesis and kauchema, translated "boast," and "boasting," in the AV, are always translated "glory," and "glorying" in the RV, e.g., 2—Corinthians 10:15; 11:10,17; Ephesians 2:9 . See GLORY.

A — 2: μεγαλαυχέω
(Strong's #3166 — Verb — megalaucheo — meg-al-ow-kheh'-o )

from megala, "great things," and aucheo, "to lift up the neck," hence, "to boast," is found in some texts of James 3:5 . The most authentic mss. have the two words separated. It indicates any kind of haughty speech which stirs up strife or provokes others.

Acts 5:36
B — 1: ἀλαζών
(Strong's #213 — Noun Masculine — alazon — al-ad-zone' )

"a boaster," Romans 1:30; 2—Timothy 3:2 , AV, "boasters," RV, "boastful," primarily signifies "a wanderer about the country" (from ale, "wandering"), "a vagabond;" hence, "an impostor."

B — 2: ἀλαζονεία
(Strong's #212 — Noun Feminine — alazoneia — al-ad-zon-i'-a )

the practice of an alazon, denotes quackery; hence, "arrogant display, or boastings," James 4:16 , RV, "vauntings;" in 1—John 2:16 , RV, "vainglory;" AV, "pride." See PRIDE , VAUNT.

2—Corinthians 9:4