estrange vs drift apart

estrange and drift apart both are verbs.

Word	Noun	Adjective	Verb	Adverb
estrange	No	No	Yes	No
drift apart	No	No	Yes	No

As verbs, drift apart is a hyponym of estrange; that is, drift apart is a word with a more specific, narrower meaning than estrange:

estrange: arouse hostility or indifference in where there had formerly been love, affection, or friendliness
drift apart: lose personal contact over time

Other hyponyms of estrange include drift away, wean.

estrange (verb)	drift apart (verb)
arouse hostility or indifference in where there had formerly been love, affection, or friendliness	lose personal contact over time
remove from customary environment or associations