adj. 1
Ready.
The reports are good to go.
adj. 2
Of a person or an animal: Acting in the interest of what is beneficial, ethical, or moral.
adj. 3
Of a person or an animal: Competent or talented.
And Marsha says I am a good cook!
n. 1
The forces or behaviours that are the enemy of evil. Usually consists of helping others and general benevolence.

Related words

Word family: good-by good-bye gooden good-for-naught good-for-nothing goodful good-good good-hearted
Phrases: no-good good deal good luck make good good fortune good sense good enough good day

Forms

From the opposite of good, on the left, to its strongest synonyms, on the right.

Good or Utility?

Utility is chiefly used in the sense of some immediate or personal and generally some material good.

J. C. Fernald, English Synonyms and Antonyms (1914)

Use in printed books, per decade from 1850 to 2019.

4 letters: just¹, well¹, real¹, kind¹, full¹, nice¹, able², fine¹, safe¹, dear¹, gurt
5 letters: right¹, great¹, ready², sound¹, worth¹, solid², ample², adept²
6 letters: proper², honest², useful², expert², decent², clever², superb²
7 letters: amazing³, benefit³, genuine³, saintly²
8 letters: complete², positive³, pleasant², goodness², terrific³, pleasing², cheerful², salutary⁴
9 letters: effective³, wonderful³, excellent³, fantastic³, fortunate³, favorable⁴, competent³, righteous², honorable⁴, admirable⁴
10 letters: acceptable⁴, convenient³, beneficial⁴, honourable⁴, favourable, proficient³, dependable⁴
11 letters: commendable⁴
12 letters: advantageous⁴

The small number after each word is its number of syllables (able² = 2 syllables).