FAVOURABLE
advantageous, favorable, favourable
(adjective) giving an advantage; “a contract advantageous to our country”; “socially advantageous to entertain often”
golden, favorable, favourable, lucky, prosperous
(adjective) presaging or likely to bring good luck or a good outcome; “a favorable time to ask for a raise”; “lucky stars”; “a prosperous moment to make a decision”
favorable, favourable
(adjective) (of winds or weather) tending to promote or facilitate; “the days were fair and the winds were favorable”
favorable, favourable
(adjective) encouraging or approving or pleasing; “a favorable reply”; “he received a favorable rating”; “listened with a favorable ear”; “made a favorable impression”
Source: WordNet® 3.1
Etymology
Adjective
favourable (comparative more favourable, superlative most favourable)
Pleasing, encouraging or approving.
Synonyms: approving, encouraging, good, pleasing
Antonyms: bad, discouraging, displeasing, unfavorable
Useful or helpful.
Synonyms: advantageous, helpful, useful
Antonym: unhelpful
Convenient or at a suitable time; opportune.
Synonyms: convenient, good, handy, opportune, suitable
Antonyms: bad, inconvenient, inopportune, unsuitable
Auspicious or lucky.
Synonyms: auspicious, fortunate, lucky
Antonyms: inauspicious, unfavourable, unlucky
Source: Wiktionary