1: τάχα
(Strong's #5029 — Adverb — tacha — takh'-ah )

is translated "perhaps" in Philemon 1:15 . See PERADVENTURE.

2: ἄρα
(Strong's #686 — particle — ara — ar'-ah )

a particle, "then," sometimes marking a result about which some uncertainty is felt, is translated "perhaps" in Acts 8:22 .

2—Corinthians 2:7