opportunistic vs timeserving

opportunistic and timeserving both are adjectives.

Word	Noun	Adjective	Verb	Adverb
opportunistic	No	Yes	No	No
timeserving	No	Yes	No	No

As adjectives, opportunistic and timeserving are synonyms defined as:

opportunistic and timeserving: taking immediate advantage, often unethically, of any circumstance of possible benefit

Other synonyms of opportunistic include opportunist.

opportunistic (adjective)	timeserving (adjective)
taking immediate advantage, often unethically, of any circumstance of possible benefit	taking immediate advantage, often unethically, of any circumstance of possible benefit