Nouns

(n)pat, rap, tapthe sound made by a gentle blow
(n)tap, pat, daba light touch or stroke

Verbs

(v)chuck, patpat or squeeze fondly or playfully, especially under the chin
(v)dab, pathit lightly“pat him on the shoulder”

Adjectives

(s)glib, pat, slickhaving only superficial plausibility“glib promises”, “a slick commercial”
(s)patexactly suited to the occasion“a pat reply”

Adverbs

(r)patcompletely or perfectly“he has the lesson pat”, “had the system down pat”