distressed vs unhappy

distressed and unhappy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
distressed	No	Yes	No	No
unhappy	No	Yes	No	No

As adjectives, distressed and unhappy are synonyms defined as:

Other synonyms of distressed include dysphoric.

distressed (adjective)	unhappy (adjective)
generalized feeling of distress	experiencing or marked by or causing sadness or sorrow or discontent
facing or experiencing financial trouble or difficulty	generalized feeling of distress
afflicted with or marked by anxious uneasiness or trouble or grief	marked by or producing unhappiness
suffering severe physical strain or distress	causing discomfort